15:00 - 19:00 - Sunday registration
07:30 - 09:00 - Registration
09:00 - 09:30 - Opening ceremony
09:30 - 10:30 - Plenary session
09:30 - Part I
Session chairperson(s): Martin Wegener, Karlsruhe Institute of Technology, Germany
Metamaterial dispersion engineering: A new paradigm in microwave science and technology Christophe Caloz, Ecole Polytechnique de Montreal, Canada
10:30 - 11:00 - Coffee break (morning)
11:00 - 13:00 - Plenary session
11:00 - Part II
Session chairperson(s): Richard Ziolkowski, University of Arizona, USA
Nonlinear and switchable photonic metamaterials Nikolay Zheludev, Optoelectronics Research Centre, University of Southampton, United Kingdom Metatronics with light and electrons: Taming the optics and electronics with metamaterials Nader Engheta, Department of Electrical and Systems Engineering, University of Pennsylvania, USA
13:00 - 14:30 - Lunch
14:30 - 16:10 - Parallel sessions Monday 1
14:30 - Special session 2 Near Field Optics [Show abstract]
Near-field measurements have given us the ability to measure field distributions directly around metallic nanostructures. Recent advances include measurements down to the lambda/100 level, the measurement of vector fields which gives informations about the polarization directions, as well as the ability to measure the magnetic field components directly. The invited speakers will give an overview over recent advances in the near- and mid-IR spectral region as well as a discussion of the near-field of optical nano-antennas.
Organizer(s): Harald Giessen, University of Stuttgart, Germany
Session chairperson(s): Harald Giessen, University of Stuttgart, Germany
14:30 - 15:10 - Mapping light fields near photonic nanostructures Keynote [Show abstract] L. (Kobus) Kuipers, Center for Nanophotonics, FOM-Institute AMOLF, The Netherlands Nanostructures can exert a huge control over light at the nanoscale. This control is of both academic and industrial interest. The strong interplay between the geometry and the light results in highly structured light fields on the nanoscale. In this presentation I will show recent progress in the visualization of such light fields. Surface plasmons launched from periodic arrays of holes exhibit the Talbot effect [1]. By exploiting a recent advance in the measurement of vector fields with near-field microscopy [2], we were able to determine the symmetry of MIM modes in plasmonic slot waveguides [3] and of plasmonic nanowire modes [4]. Building on our ability to distinguish different vector components gives access to the magnetic component of light. This integral part of light is normally never observed as light-matter interactions are usually governed by the electric part rather than the magnetic part: when we see light, we perceive the electric field, we are ‘blind’ to the magnetic field. With a ‘split’ nanoprobe we succeeded to visualize the magnetic component of propagating light at optical frequencies [5]. 15:10 - 15:30 - Antennas for Light: interfacing antennas to single photon emitters Invited [Show abstract] Niek F. van Hulst, Institute of Photonic Sciences, Spain In this presentation the optical analogue of monopole [1,2], dipole, multipole and multi element antennas [3,4] will be presented, focusing on nanoscale field concentration, directionality, femtosecond response, spectral resonances and phase shaped excitation. 15:30 - 15:50 - Linear plasmonic nano-antennas: Nearfield imaging of farfield excitation and emission Invited [Show abstract] Ralf Vogelgesang, Max Planck Institute for Solid State Research, Germany Localized surface plasmons, being a resonant excitation in metallic nanoparticles, provide intriguing opportunities for novel, ultra-efficient devices. Understanding the interplay between the geometry of the nanoparticles and the field distribution of their eigenmodes is essential to optimize their resonant character. Their reliable experimental characterization can be viewed as a starting point of all further considerations. Here, we focus is on the examples of metallic nano-wire antennas. To measure their eigenmodes, we use apertureless Scanning Near-Field Optical Microscopy (aSNOM) with cross-polarized excitation and scattered radiation [1]. This approach allows mapping nearly unperturbed eigenmodes of plasmonic nanostructures [2-4]. We demonstrate how, from the combinatorial imaging of many different structures under virtually identical excitation conditions, important properties of the fabricated can be extracted, such as resonant geometry, effective propagation wavelength, or reflection phase. Finally we discuss our recently developed analytic model for the nano-wire antennas [5]. 15:50 - 16:10 - Phase-sensitive mapping of nanoscale optical vector fields Invited [Show abstract] R. Hillenbrand, Nanooptics Laboratory, CIC nanoGUNE Consolider and IKERBASQUE, Basque Foundation for Science, Spain M. Schnell, Laboratory, CIC nanoGUNE Consolider, Spain A. Garcia Etxarri, Center for Materials Physics and Donostia International Physics Center, Spain J. Aizpurua, Center for Materials Physics and Donostia International Physics Center, Spain We demonstrate nanoscale resolved mapping of the near-field distribution of optical antennas by scatter-ing-type scanning near-field optical microscopy (s-SNOM). Polarization-resolved interferometric detection yields amplitude, phase as well as the direction of the local electric fields, allowing for complete characterization of the polarization state of nanoscale confined light fields such as found in antenna gaps. We further apply the technique to monitor the evolution of the near-field oscillations of mid-infrared gap antennas progressively loaded with metallic bridges of varying size. The results provide direct experimental evidence that the local near-field amplitude and phase can be controlled by antenna loading, which is in excellent agreement with numerical calculations.
14:30 - Session 2a RF Metamaterials
Session chairperson(s): Francisco Medina, Universidad de Sevilla, Spain
14:30 - 14:50 - Magnetodielectric sphere composites: An all dielectric route for low loss, isotropic DNG metamaterials Oral [Show abstract] James Carroll, Sandia National Labs, USA Jacques Loui, Sandia National Labs, USA Paul Clem, Sandia National Labs, USA Michael Sinclair, Sandia National Labs, USA Conventional approaches for obtaining metamaterial properties (±εr, ±µr) are based on orientation-dependent, lossy metallic structures, e.g. split ring resonator/wire pairs, fishnet and omega shaped structures. An alternative route, via Mie resonances of magnetodielectric structures, provides a mechanism for engineered electrical and magnetic response. In this presentation, numerical and experimental results demonstrate an approach for achieving an isotropic, double negative (DNG) metamaterial composite at Ku/K band frequencies. Additional, topics to be discussed include material selection, microstructure-property relationships, and magnetoelectric coupling effects. 14:50 - 15:10 - Experimental investigation of active broadband ENZ transmission line based on negative capacitors Invited [Show abstract] Silvio Hrabar, University of Zagreb, Croatia Igor Krois, University of Zagreb, Croatia Ivan Bonic, University of Zagreb, Croatia Aleksandar Kiricenko, University of Zagreb, Croatia An active dispersionless Epsilon Near Zero (ENZ) transmission line operating in low RF band (1 MHz-50 MHz) is investigated experimentally. It is shown that this line exhibits extremely broadband ENZ behavior accompanied by counterintuitive superluminal phase and group velocities. 15:10 - 15:30 - Sub-wavelength superconducting RF metamaterials with spiral resonant elements Invited [Show abstract] Cihan Kurter, University of Maryland, United States John Abrahams, University of Maryland, USA Alexander P. Zhuravel, National Academy of Sciences of Ukraine, Ukraine Alexey V. Ustinov, Universitat Karlsruhe, Germany Steven M. Anlage, University of Maryland, USA We have designed ultra-small RF metamaterials with magnetically active spiral elements made of super-conducting Nb films. Transmission measurements on single and 1-D array of spirals show robust magnetic response as Nb is in the superconducting state. The tunability of the resonant features in the transmission data is studied via temperature and RF magnetic field. 15:30 - 15:50 - Surface guiding phenomena based on Planar Metamaterial Configurations Invited [Show abstract] Francisco Falcone, Universidad Publica de Navarra, Spain Miguel Navarro, Universidad Publica de Navarra, Spain Miguel Beruete, Universidad Publica de Navarra, Spain Stefan Maier, Imperial College, UK Mario Sorolla, Universidad Publica de Navarra, Spain In this presentation, surface guiding phenomena supported on planar metamaterial configurations will be described. Due to the capability of energy confinement that Electroinductive Waves can support, effective guiding is feasible, leading to novel transmission line configuration, which can be of application in the integration of planar devices in a broad frequency range 15:50 - 16:10 - Dispersion characteristics of magnetoinductive waves on double chains of split-ring resonators in the presence of retardation Oral [Show abstract] Vadym Lomanets, Max Planck Institute for the Science of Light, Erlangen, Germany Oleksandr Zhuromskyy, Cluster of Excellence Engineering of Advanced Materials, University of Erlangen-Nuremberg, Germany Georgy Onishchukov, Max Planck Institute for the Science of Light, Erlangen, Germany Eugen Tatartschuk, Erlangen Graduate School in Advanced Optical Technologies, University of Erlangen-Nuremberg, Germany Ekaterina Shamonina, Erlangen Graduate School in Advanced Optical Technologies, University of Erlangen-Nuremberg, Germany Ulf Peschel, Cluster of Excellence Engineering of Advanced Materials, University of Erlangen-Nuremberg, Germany Wave propagation on two coupled chains of split-ring resonators is studied experimentally and theoretically. Several guided modes are found: two backward waves, one of those is strongly coupled with the free-space wave, and a forward wave close to the light line. Both backward waves propagate only inside a narrow frequency range. The shape of dispersion characteristics of backwards waves can be easily changed by changing the coupling between the chains and the elements in a chain.
14:30 - Session 2b Homogenization and Effective Medium Theories 1
Session chairperson(s): Anne de Baas, EUROPEAN COMMISSION DG RTD, Belgium
14:30 - 14:50 - Bulk and surface proxiton-polaritons in split-ring metamaterials Invited [Show abstract] Ekaterina Shamonina, University of Erlangen-Nuremberg, Erlangen Graduate School in Advanced Optical Technologies (SAOT), Germany Anna Radkovskaya, Magnetism Division, Faculty of Physics, M.V. Lomonosov Moscow State University, Russia We employ a two-dimensional equivalent circuit model of coupled lumped elements to work out components of the permeability tensor in a 2D split-ring structure. Inter-element coupling results in a dramatic shift of the frequency range of negative permeability and in a strong spatial dispersion of permeability. Conditions for existence of both bulk and surface proxiton-polaritons (hybrid polaritonic modes of electromagnetic waves and of slow waves of coupling between resonators) are related to circuit characteristics of the metamaterial structure. The method enables one to design structures with controllable effective material parameters. Generalisation to different types of unit cells, including metamaterials with negative refractive index, is discussed. 14:50 - 15:10 - A generalization of the Lorentz's local field method accounting for strong spatial dispersion in magnetic metamaterials Oral [Show abstract] J. D. Ortiz, Department of Physics, Universidad Nacional de Colombia, Colombia Juan Domingo Baena, Department of Physics, Universidad Nacional de Colombia, Colombia For most resonant metamaterials, close to the working frequency, the constitutive parameters of the medium reach very high values which implies a shortening of the medium wavelength. It makes necessary a rigorous theory including spatial dispersion. Here we show a theory of the local field within a magnetic resonant metamaterial. 15:10 - 15:30 - Homogenization of fishnet metamaterials: Possibilities and restrictions Oral [Show abstract] Lukas Jelinek, Czech Technical University in Prague, Department of Electromagnetic Field, Czech Republic Ricardo Marques, University of Seville, Department of Electronics and Electromagnetism, Spain Jan Machac, Czech Technical University in Prague, Department of Electromagnetic Field, Czech Republic The possibilities and restrictions of homogenization in fishnet metamaterials are studied. By means of 1D and 2D dispersion diagrams obtained by combination of mode-matching with generalized eigenvalue problem it is shown that in narrow frequency region just below Wood's anomaly the approximation of fishnet by uniaxial medium is allowed. It is also shown that this is the frequency band of possible negative refraction. 15:30 - 15:50 - Extraction of effective material parameters for single and multi-layer metamaterial structures Oral [Show abstract] Zsolt Szabo, Advanced Plasmonics and Photonics Group, A*STAR Institute of High Performance Computing, Singapore Er Ping Li, Advanced Plasmonics and Photonics Group, A*STAR Institute of High Performance Computing, Singapore In this presentation an algorithm for extracting the effective constitutive parameters of metamaterials is derived. The procedure is based on the Fresnel-Airy formulas of a homogeneous slab. The novelty of our approach lies in employing the Kramers-Kronig relations to estimate the real part of the refractive index from the extinction coefficient, in order to ensure the uniqueness of the effective parameters. The accuracy of the method is demonstrated by retrieving the effective parameters of a homogeneous slab. This study reveals under which conditions the calculations involve more than one branch of the complex logarithmic function. Then metamaterials built up from one or more layers of a fishnet structure are investigated. The applicability and the limits of the presented algorithm are explored by observing the behavior of the effective parameters as the number of metamaterial layers is increased. 15:50 - 16:10 - Near resonance homogenization of split-ring metamaterials Invited [Show abstract] Hicham Belyamoun, Laboratoire de Genie Electrique de Paris, France Said Zouhdi, Laboratoire de Genie Electrique de Paris, France Our motivation in this paper is to simulate the split-ring resonator behaviour by computing it's effecive permability. Such a task could be done with a minimum cost if we can take advantage of the translational symmetry of the periodic structure. We will use the homogenization approach to approximate best the split-ring array with a homogeneous material.
16:10 - 16:40 - Coffee break (afternoon)
16:40 - 18:20 - Parallel sessions Monday 2
16:40 - Special session 5 Plasmonics and Extraordinary Transmission [Show abstract]
After the experimental discovery of Extraordinary Transmission phenomenon, an intense discussion appeared on its initial plasmonic origin due to the replication in nearly perfect conductivity experiments and several models have been therefore proposed. Now, the field has received novel ideas from the Metamaterials area and negative refraction has been demonstrated. Also, the possibility of its applications in waveguides and antennas for the Terahertz gap is open. The special session covers a broad spectrum of the above described topics.
Organizer(s): Mario Sorolla, Millimeter & THz Waves Lab. UPNA, Spain
Session chairperson(s): Mario Sorolla, Millimeter & THz Waves Lab. UPNA, Spain
16:40 - 17:00 - Dual-band and broadband THz spoof surface plasmon metamaterials Invited [Show abstract] Stefan Maier, Imperial College London, United Kingdom New surface geometries such as arrays of annular holes and complementary split ring resonators allow for high-confinement THz surface waveguiding with a significantly wider bandwidth than previously reported with simple square hole or slit arrays. Numerical design and experimental realizations will be presented. 17:00 - 17:20 - Polarization sensitive metamaterial demultiplexer Invited [Show abstract] Miguel Beruete, Millimeter and Terahertz Waves Laboratory, Universidad Publica de Navarra, Spain Miguel Navarro-Cía, Millimeter and Terahertz Waves Laboratory, Universidad Publica de Navarra, Spain Francisco Falcone, Millimeter and Terahertz Waves Laboratory, Universidad Publica de Navarra, Spain Igor Campillo, CIC nanoGUNE Consolider, Spain Mario Sorolla, Millimeter and Terahertz Waves Laboratory, Universidad Publica de Navarra, Spain In this work we present the design and measurement of a birefringent prism metamaterial showing positive or negative refraction for orthogonal polarizations. The structure is composed of stacked quasi-self-complementary extraordinary transmission perforated plates. Numerical and experimental results show that negative refraction is intimately linked to extraordinary transmission. 17:20 - 17:40 - Plasmonics for terahertz quantum cascade lasers beam-shaping Invited [Show abstract] Tahsin Akalin, IEMN, Lille 1 University, France Extraordinary Transmission (ET) opens different ways for novel applications especially at Terahertz frequencies. Quantum Cascade Lasers (QCL) are probably the most promising sources for Terahertz wave generation. The key issue especially for double metal QCLs is the extraction and the beam shaping of the emitted power. We propose a solution with a TEM-Horn Antenna and also with an Extraordinary Transmission array and we compare it to the most recently proposed solutions. 17:40 - 18:00 - Extraordinary extinction and enhanced emission by arrays of plasmonic antennas Invited [Show abstract] Jaime Gomez Rivas, FOM Institute for Atomic and Molecular Physics, AMOLF, Netherlands We investigate extinction of light by arrays of nanoantennas and emission of dye molecules in the proximity of these arrays. Light diffracted in the plane of the antennas enhances the radiative coupling of localized plasmon resonances, giving rise to surface lattice resonances. These resonances improve the emission of the dye. 18:00 - 18:20 - Resonant optical transmission through hole arrays in optically thin metal filmsWithdrawal, Invited [Show abstract] Jose Luis Martin-Moreno, Instituto de Ciencia de Materiales de Aragon (CSIC), Spain Sergio G. Rodrigo, Instituto de Ciencia de Materiales de Aragon (CSIC), Spain Alexey Yu. Nikitin, Instituto de Ciencia de Materiales de Aragon (CSIC), Spain A. V. Kats, Theoretical Physics Department, A. Ya. Usikov Institute for Radiophysics and Electronics, Ukrainian Academy of Sciences, Kharkov, Ukraine I. S. Spevak, Theoretical Physics Department, A. Ya. Usikov Institute for Radiophysics and Electronics, Ukrainian Academy of Sciences, Kharkov, Ukraine F. J. Garcia-Vidal, Departamento de Fisica Teorica de la Materia Condensada, Universidad Autonoma de Madrid, Spain We present a theoretical study on the extraordinary optical transmission through square hole arrays in a metal film, focusing on the dependence on the metal thickness. More precisely, we will study the crossover from the (now canonical) optically thick films to the case of optically thin films. We show that, as the thickness of the metal film decreases the extraordinary optical transmission peak red shifts, due to the coupling of light with the short-range surface plasmons. Remarkably, the ratio between the maximum and minimum values of the transmittance is high even for metal thicknesses as small as one skin depth.
16:40 - Session 5a Physics of Complex Electromagnetic Media
Session chairperson(s): Ricardo Marques, Universidad de Sevilla, Spain
16:40 - 17:00 - Bivector decomposition of linear media and bi-anisotropic wave equationsWithdrawal, Oral [Show abstract] Luzi Bergamin, Aalto University, School of Science and Technology, Finland Alberto Favaro, Imperial College London, United Kingdom Based on the four dimensional formulation of electrodynamics using spacetime tensors a new decomposition of all linear media in terms of bivectors is proposed. It establishes an immediate connection to the six dimensional formulation and is especially useful in the context of wave equations in the geometric optics limit, which can be re-written entirely in six dimensional form. 17:00 - 17:20 - Relativistic effects for superluminal (bi)-isotropic media Oral [Show abstract] Sérgio Matos, Instituto de Telecomunicações, and Department of Electrical and Computer Engineering, Portugal Carlos R. Paiva, Instituto de Telecomunicações, and Department of Electrical and Computer Engineering, Portugal Afonso M. Barbosa, Instituto de Telecomunicações, and Department of Electrical and Computer Engineering, Portugal New physical effects take place when the phase velocity of a moving isotropic medium is above the speed of light in vacuum (superluminal regime), namely: i) complex aberration, i.e., complex angles in the proper frame actually correspond to real angles in the lab frame; ii) a new Cerenkov region, where the phase velocity is below the relative velocity between frames. In fact, by considering lossless zero refractive index metamaterials, these effects can still occur for non-relativistic velocities. However, when losses are taken into account, these effects can only be obtained for relativistic velocities. In this communication we address the superluminal regime for moving bi-isotropic media. As these media can be studied as a superposition of two moving isotropic media, a new combination of the effects that are usually found for the superluminal and subluminal regimes can occur. Furthermore, the influence of the new degrees of freedom on the “slow” relativistic effects is studied. These media are then analyzed through the Bohren decomposition using spacetime algebra (the geometric algebra of Minkowski spacetime). This new approach circumvents the cumbersome calculations that are usually associated with this problem. 17:20 - 17:40 - Negative permeability from high frequency spin wave resonances in thin ferromagnetic films Oral [Show abstract] Rostislav Mikhaylovskiy, University of Exeter, United Kingdom Euan Hendry, University of Exeter, UK Volodymyr Kruglyak, University of Exeter, UK We propose a multilayered metamaterial based on ferromagnetic thin films. We present a theory that describes both magnonic excitations in an individual magnetic film and resulting macroscopic electromagnetic properties of the metamaterial consisting of many such films. The feasibility of simultaneously negative values of effective permeability and permittivity at frequencies of several hundred GHz is demonstrated. 17:40 - 18:00 - The optimal material for interactions with linearly-polarized electromagnetic waves Invited [Show abstract] Sergei Tretyakov, Aalto University, Finland In this presentation we will introduce the concept of ``optimal metamaterials'' for interactions with linearly polarized waves. In these materials, the inclusion shape is chosen so that the particles extract maximum possible power from linearly polarized waves propagating or decaying inside the medium. It appears that the optimal optimal particles are bianisotropic, and the ``optimal material'' for interactions with evanescent waves is the omega material, while for propagating waves it is a certain nonreciprocal material. 18:00 - 18:20 - On the incompatibility of relations P=hk and ΔM =E/c2 with wave-particle duality principle for the electromagnetic waves in a substance. Invited [Show abstract] Victor Veselago, Institute of General Physics, Russia The problem of photon linear momentum in a refracting medium is discussed. It is shown that the relations P=hk and ΔM =E/c2 cannot hold simultaneously in a refracting medium.
16:40 - Session 5b Tunable, Reconfigurable, and Nonlinear Metamaterials 1
Session chairperson(s): Manuel Freire, University of Seville, Spain
16:40 - 17:00 - Tunable metamaterials: A comparative study of different geometries and modulation mechanismsWithdrawal, Invited [Show abstract] Antonello Andreone, University of Naples Federico II, Italy Nassim Chikhi, University of Naples Federico II, Italy Emiliano Di Gennaro, University of Naples Federico II, Italy Emanuela Esposito, CNR-IC E. Caianiello, Italy Ilaria Gallina, University of Sannio, Italy Giuseppe Castaldi, University of Sannio, Italy Vincenzo Galdi, University of Sannio, Italy We designed metamaterial-based devices which can be frequency-tuned by using different modulation mechanisms. We modelled periodic structures consisting of different unit cells based on the concept of split ring resonator. In order to study the device responses in the frequency region of interest, we carried out several numerical simulations via commercial electromagnetic software. Moreover, we explored several tunability mechanisms for such resonators within various ranges of frequencies, from microwaves to the THz region, including the use of different kinds of capacitors, microelectromechanical systems, or liquid crystals. Experimental measurements are currently under way. 17:00 - 17:20 - Electronically tunable phase metasurface : application to frequency agile directive cavity antennas Oral [Show abstract] Shah Nawaz Burokur, University Paris-Ouest, France Jean-Pierre Daniel, Advanten, France Philippe Ratajczak, Orange Labs - R&D, France André de Lustrac, University Paris-Sud, France The directive emission from a bi-layered LC-resonant metamaterial surface is experimentally reported. The tunable phase metasurface by the incorporation of varactor diodes is used as a Partially Reflecting Surface (PRS) in a Fabry-Perot cavity. Far field radiation patterns obtained by direct measurements show the agility of emission frequency while maintaining an enhanced directivity. 17:20 - 17:40 - Tailoring electromagnetic response with arrays of cut magnetic wires Oral [Show abstract] Larissa Panina, University of Plymouth, UK Mihail Ipatov, Universidad del País Vasco, Spain Valentina Zhukova, Universidad del País Vasco, Spain Arkady Zhukov, Universidad del País Vasco, Spain Julian Gonzalez, Universidad del País Vasco, Spain We have investigated the scattering spectra in two-layer system with arrays of cut magnetic wires. The system geometry allows the realisation of resonance modes of electric and magnetic types due to current reso-nances in individual wires and wire-pairs. The resonance modes are reviled in the scattering spectra and a strong effect of a magnetic field is demonstrated although it was difficult to discriminate between electric and magnetic modes. 17:40 - 18:00 - Interacting ferromagnetic-metal nanoparticles for tunable left-handed metamaterials Oral [Show abstract] Satoshi Tomita, Nara Institute of Science and Technology, Japan Chiharu Mitsumata, Hitachi Metals Ltd., Japan Masayuki Hagiwara, Osaka University, Japan Kensuke Akamatsu, Konan University and JST-PRESTO, Japan We have studied electron magnetic resonance (EMR) of ferromagnetic-metal nanoparticles which show promise as tunable magnetic metamaterials. Micromagnetics simulation reveals that the parallel component of the magnetic dipolar field brings about the shift of the EMR signal and that the perpendicular component causes the broadening of the resonance. 18:00 - 18:20 - Unusual spectral response of loss-compensated plasmons in active gain media Oral [Show abstract] Alessandro Veltri, CNRS - Centre de Recherche Paul Pascal, France Ashod Aradian, CNRS - Centre de Recherche Paul Pascal, France We study theoretically the amplification of localized plasmons in metallic nanoparticles coupled to a surrounding active gain medium. We show that the resulting loss-compensated plasmons have intrinsically different spectral responses from usual, non-compensated plasmons. In particular, a plasmon with fully compensated losses can never be the same as the classical, ``ideal'' plasmon (i.e., a plasmon in a lossless Drude metal particle). We discuss the above differences in the case of silver and gold particles, and show that the differences are more striking in the latter case due to the higher level of intrinsic (interband) losses.
18:20 - 19:00 - Break before the Welcome reception
19:00 - 21:00 - Welcome reception
08:20 - 10:00 - Parallel sessions Tuesday 3
08:20 - Special session 7 Metamaterials for MRI Applications [Show abstract]
Metamaterials have for some time offered the intriguing prospect of controlling magnetic properties at RF frequencies using materials that have no effect at DC. Because field integrity is key to image fidelity in magnetic resonance imaging, this property should allow flexible deployment of magnetically invisible components that can increase signal to noise ratio or provide other functionality. Applications are therefore likely to exist in RF signal transmission and detection, and in more general flux manipulation and shielding. This session will present the latest advances in the field, and attempt to highlight applications where advantageous performance (particularly, improved SNR) may be obtained over more conventional approaches.
Organizer(s): Richard Syms, Imperial College London, United Kingdom
Session chairperson(s): Richard Syms, Imperial College London, United Kingdom
08:20 - 08:40 - A CRLH zeroth-order resonant antenna (ZORA) with high near-field polarization purity used as an RF coil element for ultra high field MRI Invited [Show abstract] Andre Rennings, University of Duisburg-Essen, Germany Philipp Schneider, University of Duisburg-Essen, Germany Simon Otto, University of Duisburg-Essen, Germany Daniel Erni, University of Duisburg-Essen, Germany Christophe Caloz, École Polytechnique de Montréal, Canada Mark Ladd, Erwin L. Hahn Institute for MRI, Essen, Germany A CRLH zeroth-order resonant antenna (ZORA) with near-field performance optimized for ultra high field magnetic resonance imaging (MRI) is presented. Due to its zeroth-order resonance mode, occurring at the frequency where the phase constant is zero, the ZORA supports a highly uniform field, as required for MRI. Moreover, it exhibits a favorable longitudinal scalability for RF coils lengths ranging from 10cm to up to 1m. Compared to previous implementations, the proposed ZORA uses SMD chip components placed at the back of the radiator to provide the CRLH shunt resonator elements instead of transverse stubs. As a result, the longitudinal magnetic field contributions are essentially suppressed and high transverse magnetic field purity, allowing high-resolution MRI, is achieved. As an other consequence, the transverse size of the antenna is dramatically reduced, which is particularly beneficial for head or brain imaging, where an undisturbed eye-contact with the patient is required in functional MRI. The proposed ZORA features a low profile, and could therefore be integrated behind the inner bore dielectric cover. 08:40 - 09:00 - Periodic interconnects for internal MRI Invited [Show abstract] Richard Syms, Imperial College London, United Kingdom Ian Young, Imperial College London, United Kingdom Munir Ahmad, Imperial College London, United Kingdom Chris Wadsworth, St Mary's Hospital, Imperial College, United Kingdon Julie Fitzpatrick, St Mary's Hospital, Imperial College, United Kingdom Thin film cables based on a microstrip with a periodically patterned ground plane are proposed as impedance matched interconnects for internal MRI. Experimental confirmation is provided using cables and resonant detectors fabricated by double-sided patterning of copper-clad polyimide, which are wrapped around catheters. High-resolution 1H imaging is demonstrated at 1.5T. 09:00 - 09:20 - Local and remote parametric amplification of magnetic resonance images Invited [Show abstract] Timmy Floume, Imperial College London, United Kingdom Richard Syms, Imperial College London, United Kingdom Ian Young, Imperial College London, United Kingdom M. Rea, Imperial College London, United Kingdom Laszlo Solymar, Imperial College London, United Kingdom Mike Wiltshire, Imperial College London, United Kingdom Simultaneous detection and amplification of magnetic resonance images is demonstrated using a lumped-element three-frequency parametric amplifier. A design is presented for intrinsically safe parametric amplification in internal imaging using a remote amplifier with signal transfer by magneto-inductive waves. 09:20 - 09:40 - Wire-medium waveguide for 7 Tesla magnetic resonance imaging Invited [Show abstract] Xavier Radu, Université catholique de Louvain, Belgium Nico van den Berg, University Medical Center Utrecht, the Netherlands Christophe Craeye, Université catholique de Louvain, Belgium Wire medium has the ability to manipulate the near-field of an electromagnetic source. The objective of the present paper is to demonstrate numerically and experimentally that a wire medium can be used to enhance the homogeneity of RF field in 7 Tesla magnetic resonance imaging. 09:40 - 10:00 - Analysis of the focusing properties of split-ring metamaterial superlenses for magnetic resonance imaging applications Invited [Show abstract] Manuel Freire, University of Seville, Spain Jose Algarín, University of Seville, Spain Ricardo Marqués, University of Seville, Spain Peter Jakob, University of Würzburg, Germany Volker Behr, University of Würzburg, Germany Marcos López, University of Würzburg, Germany In this work, the ability of split-ring metamaterial superlenses to enhance the resolution of the radiofre-quency magnetic field produced by magnetic resonance surface coils is analyzed. An experiment is designed from the theoretical results provided by a homogenization procedure for a split-ring metamaterial slab. In this experiment, a two channel array of coils is fabricated to obtain magnetic resonance images of a phantom that show the enhancement of the resolution. The ability to enhance the field resolution of surface coils could find application in parallel imaging techniques which make use of the distinct coil sensitivities in a finite region in space to reduce the imaging acquisition time.
08:20 - Session 7a Optical Metamaterials 2
Session chairperson(s): Vladimir Shalaev, Purdue University, USA
08:20 - 08:40 - Near-infrared metamaterials with large frequency tunability and enhanced spontaneous emission Invited [Show abstract] Harry Atwater, California Institute of Technology, USA Koray Aydin, California Institute of Technology, USA Imogen Pryce, California Institute of Technology, USA Dennis Callahan, California Institute of Technology, USA Tunable infrared metamaterials are demonstrated via tensile loading of split ring resonator arrays on elas-tomeric polymer substrates. A tuning range comparable to the resonant linewidth is observed and can be ex-plained by analysis of the resolved nanoscale mechanical stresses applied to the split ring resonators. Split reso-nators are also found to exhibit interesting properties as antennas, exhibiting a greater enhancement of spontaneous emission, narrower spectral linewidth and higher Q values than for similar-sized split dipole half-wave antennas. 08:40 - 09:00 - Liquid crystal tunable fishnet metamaterials Oral [Show abstract] Aliaksandr Minovich, Nonlinear Physics Center, Research School of Physics and Engineering, Australian National University, Canberra, Australia Dragomir Neshev, Nonlinear Physics Center, Research School of Physics and Engineering, Australian National University, Canberra, Australia David Powell, Nonlinear Physics Center, Research School of Physics and Engineering, Australian National University, Canberra, Australia Ilya Shadrivov, Nonlinear Physics Center, Research School of Physics and Engineering, Australian National University, Canberra, Australia Yuri Kivshar, Nonlinear Physics Center, Research School of Physics and Engineering, Australian National University, Canberra, Australia We analyze the optical response and effective macroscopic parameters of fishnet metamaterials infiltrated with a nematic liquid crystal. We show that even a small amount of liquid crystal can provide tuning of the structures due to reorientation of the liquid crystal director. This enables switchable optical metamaterials, where the refractive index can be changed from positive to negative by an external field. 09:00 - 09:20 - Substrate induced bianisotropy in symmetric optical metamaterials Oral [Show abstract] David Powell, Australian National University, Australia Ilya Shadrivov, Australian National University, Australia Yuri Kivshar, Australian National University, Australia Optical metamaterials are typically designed to be symmetric in the propagation direction, thus if there are no fabrication errors they do not exhibit bianisotropy. We show that a perfectly symmetric structure loses its symmetry when fabricated on a substrate, and this symmetry-breaking induces magneto-electric coupling. This effect is demonstrated with numerical simulation of realistic optical metamaterial structures, where the impedance becomes multi-valued. 09:20 - 09:40 - Gain in the negative-index slow-light regime Oral [Show abstract] Kosmas Tsakmakidis, Advanced Technology Institute and Department of Physics, University of Surrey, United Kingdom Edmund Kirby, Advanced Technology Institute and Department of Physics, University of Surrey, United Kingdom Ortwin Hess, Advanced Technology Institute and Department of Physics, University of Surrey, United Kingdom Using full-wave finite-difference time-domain simulations we show how the incorporation of thin layers made of an active medium adjacently to the core layer of a negative-refractive-index slow-light waveguide can (over)compensate dissipative optical losses. 09:40 - 10:00 - Nonlinear-optical coupling of backward and ordinary electromagnetic waves in negative-index metamaterials Invited [Show abstract] Alexander Popov, University of Wisconsin-Stevens Point, USA Extraordinary properties of coherent nonlinear-optical coupling of ordinary and backward electromagnetic waves in negative-index metamaterials, such as frequency-mixing and optical parametric amplification, are reviewed. The possibilities for compensating strong losses inherent to plasmonic metamaterials and for design of unique ultracompact photonic devices are discussed.
08:20 - Session 7b Millimer-Wave and THz Metamaterials 1
Session chairperson(s): Willie Padilla, Boston College, USA
08:20 - 08:40 - Terahertz antireflection coatings using metamaterials Oral [Show abstract] Hou-Tong Chen, Los Alamos National Laboratory, USA Jiangfeng Zhou, Los Alamos National Laboratory, USA John O'Hara, Los Alamos National Laboratory, USA Frank Chen, Los Alamos National Laboratory, USA Abul Azad, Los Alamos National Laboratory, USA Antoinette Taylor, Los Alamos National Laboratory, USA We demonstrate terahertz metamaterial antireflection coatings (ARCs) that significantly reduce the reflection and enhance the transmission at an interface of dielectric media. They are able to operate over a wide range of incidence angles for both TM and TE polarizations. Experiments and finite-element simulations will be presented and discussed. 08:40 - 09:00 - Ultra-thin subterahertz absorbers based on high-impedance metasurfaces Oral [Show abstract] Sergey Kuznetsov, Novosibirsk State University & Budker Institute of Nuclear Physics, Russian Academy of Science , Russia Miguel Navarro-Cía, Millimeter and Terahertz Wave Laboratory, Universidad Pública de Navarra, Spain Alexander Gelfand, Novosibirsk Branch of the Institute of Semiconductor Physics, Russia Nina Fedorinina, Novosibirsk Branch of the Institute of Semiconductor Physics, Russia Andrey Arzhannikov, Novosibirsk State University & Budker Institute of Nuclear Physics, Russian Academy of Science, Russia A. G. Paulish, Novosibirsk Branch of the Institute of Semiconductor Physics, Russia Miguel Beruete, Millimeter and Terahertz Wave Laboratory, Universidad Pública de Navarra, Spain Francisco Falcone, Millimeter and Terahertz Wave Laboratory, Universidad Pública de Navarra, Spain Mario Sorolla, Millimeter and Terahertz Wave Laboratory, Universidad Pública de Navarra, Spain In this communication we present the results of theoretical and experimental investigations of electrically thin absorbers based on high-impedance metasurfaces (HIMSs) designed for narrowband resonant absorption in the range of millimetre-submillimetre waves. The vias-free HIMSs with the topologies of conventional and complementary split-ring resonators, patch and loop arrays, as well as novel densely packed convoluted tripole elements are considered and implemented for the case of low-loss polymeric substrates and high-conductivity metallization. The resonant absorption ~90% is demonstrated experimentally at a relative resonant frequency bandwidth ~3-10% and the wavelength-to-thickness ratio >60. Further application of HIMS-based absorbers in a novel type of subterahertz bolometric receivers with frequency- and polarization-discrimination is discussed. 09:00 - 09:20 - Terahertz surface waves on thin metamaterial films Oral [Show abstract] Benjamin Reinhard, University of Kaiserslautern, Germany Oliver Paul, University of Kaiserslautern, Germany Jens Neu, University of Kaiserslautern and Fraunhofer Institute for Physical Measurement Techniques IPM, Germany René Beigang, University of Kaiserslautern and Fraunhofer Institute for Physical Measurement Techniques IPM, Germany Marco Rahm, University of Kaiserslautern and Fraunhofer Institute for Physical Measurement Techniques IPM, Germany We present experimental and numerical investigations on the excitation of resonant terahertz surface waves on thin metamaterial films. The design under investigation is an array of split-ring resonators. Terahertz transmission measurements are in excellent agreement with full-wave numerical calculations and an intuitive model which allows to model the sample as a thin slab waveguide with effective material parameters. 09:20 - 09:40 - Tuning the response of terahertz metamaterial at low temperatures Oral [Show abstract] Ranjan Singh, Los Alamos National Laboratory, USA Zhen Tian, Oklahoma State University, USA Jiaguang Han, Oklahoma State University, USA Carsten Rockstuhl, University of Jena, Germany Jianqiang Gu, Oklahoma State University, USA John F O' Hara, Los Alamos National Laboratory, USA Antoinette J Taylor, Los Alamos National Laboratory, USA Weili Zhang, Oklahoma State University, USA The transmission response of planar thin film metamaterials were measured at room and liquid nitrogen temperatures using terahertz time-domain spectroscopy. The behaviour of metamaterials at low temperatures is shown to have low-loss since the nonradiative losses are strongly suppressed due to higher metal film conductivity. We observe a temperature tunable effect and a gradual increase of 40% in the quality factor of the metamaterial 09:40 - 10:00 - Demonstration of birefringent metamaterial terahertz wave plates Oral [Show abstract] Peter Weis, University of Kaiserslautern, Germany Oliver Paul, University of Kaiserslautern, Germany Christian Imhof, University of Kaiserslautern, Germany René Beigang, University of Kaiserslautern and Fraunhofer IPM, Germany Marco Rahm, University of Kaiserslautern and Fraunhofer IPM, Germany We report a new approach for the design and fabrication of thin wave plates with high transmission in the terahertz regime. The wave plates were based on strongly birefringent cut-wire pair metamaterials that exhibit refractive indices of opposite signs for two orthogonal polarization components of an incident wave.
10:00 - 11:20 - Coffee break and poster session 1
10:00 - Poster session 1
1 - Designing tunable left handed metamaterials with nematic liquid crystal layers [Show abstract] Rafal Kowerdziej, Military University of Technology, Poland Janusz Parka, Military University of Technology, Poland Piotr Nyga, Military University of Technology, Poland Bartłomiej Salski, Warsaw University of Technology, Poland Abstract: Tunable left handed metamaterials (LHM) employing nematic liquid crystals at microwave frequencies were analyzed. A full-wave analysis technique based on the finite-difference time-domain method (FDTD) was done by QuickWave software for electromagnetic design program. 2 - Experimental study of magnetic plasmon Waves in a meta-chain of coupled slit-hole resonatorsNo show, [Show abstract] Hui Liu, Department of Physics, Nanjing University, China A type of one-dimensional meta-chain of slit-hole resonators (SHR) is experimentally investigated in this work. A broadband coherent magnetic plasmon wave (MPW) could be excited in infrared range. The coherent MPW reported in this work will present good applications in sub-wavelength integrated nano-circuits and other plasmonic devices. 3 - A dielectric resonator antenna with metallic and nonmetallic metamaterial superstratesNo show, [Show abstract] Mourad Ibrahim, Misr University for Science and Technology (MUST), Egypt Saber Zainud-Deen, Faculty of Electronic Eng., Menoufia University, Menouf, Egypt Adel Botros, Faculty of Engineering, Cairo University, Cairo, Egypt In this paper, some applications of metamaterial superstrates for directivity enhancement of cylindrical dielectric resonator antenna (DRA) are investigated. Three different types of superstrates, viz., split ring reso-nator (SRR), S-shape, and cubic high dielectric resonator (CHDR) are discussed. The metamaterial structure is used as a lens to improve the directivity of DRA. 4 - Reflection properties of electromagnetic crystal based composite material [Show abstract] Il'ya Zotov, Chelyabinsk State University, Russia Igor' Bychkov, Chelyabinsk State University, Russia Alexander Fediy, Chelyabinsk State University, Russia This work provides experimental results of testing of composite material based on dielectric matrix inside which a regular structure of graphite rods is formed. Examined material has anisotropic features that are typical for electromagnetic crystal [1]. 5 - THz field enhancement by a metal nanoslit: a simple model [Show abstract] Andrey Novitsky, Department of Theoretical Physics, Belarusian State University, Belarus Andrei Lavrinenko, Fotonik Department of Photonics Engineering, Technical University of Denmark, Denmark The near-field enhancement in the sub-skin-depth regime fundamentally differs from the extraordinary optical transmission. We propose a simple model for explanation of the THz field enhancement in the metal slit in the sub-skin-depth regime. In our opinion the enhanced field is generated by the charges at the edges of the slit and therefore can be easily estimated. Conclusions of the model provide nice coincidence with the published experimental data. 6 - Graphical method for retrieving effective metamaterial parameters [Show abstract] Simin Feng, Naval Air Warfare Center, USA Currently widely used retrieval method often encounters non-physical resonant-antiresonant coupling in retrieved permittivity and permeability of metamaterals. Here, we extend the equivalent theory to anisotropic metamaterials and discuss a general unit-cell design criterion for length-independent retrieval of effective material parameters from a single layer of unit cells. We introduce a graphical retrieval method which can directly extract the effective ordinary and extraordinary permittivities and permeabilities without resolving refractive index and impedance as middle steps. Moreover, our method is free from the non-physical resonant-antiresonant coupling. 7 - Subluminal to superluminal pulse propagation through one-dimensional photonic crystals with a three-level atomic defect layerNo show, [Show abstract] Mostafa Sahrai, University of Tabriz, Iran Shanaz Ass, University of Tabriz, Iran Mohamad Mahmoudi, University of Zanjan, Iran The propagation of an electromagnetic pulse through one-dimensional photonic crystals with a three- level dispersive and absorptive atomic defect layer is discussed. The effect of the three- level atomic dispersive and absorptive defect layer on the transmission and group velocity of a light pulse inside the one-dimensional photonic crystals is studied. It is shown that the group velocity of the light pulse can be controlled from subluminal to superluminal with the detuning parameter. 8 - Single layer metamaterial composed of silver bowties: strong magnetism and negative index at visible wavelengths [Show abstract] Ravi hegde, Institute of High Performance Computing, Singapore, Singapore Zsolt Szaboz, Institute of High Performance Computing, Singapore Erping Li, Institute of High Performance Computing, Singapore We propose a single layer bow-tie like unit-cell metamaterial design for operation in the visible wavelengths. Numerical analysis using effective medium theory predicts relatively strong magnetic response and regions of doubly negative behavior (figure of merit around 6) under normal illumination conditions and operating in the 440 - 500 nm wavelength region for the structure. A parametric study of the structural parameters of the bow-tie is presented. 9 - Heterogeneous composite coating with a low-reflection function [Show abstract] Sergey Moiseev, V.A. Kotelnikov Institute of Radio Engineering and Electronics of Russian Academy of Sciences, Ulyanovsk Branch, Russia It is theoretically shown that thin composite layer comprised of a transparent host and uniformly oriented disc-like silver nanoparticles deposited onto a glass surface can act as an anti-reflection coating. The applicability of the effective medium model for describing the optical properties of thin heterogeneous layers with moderate volume fraction of inclusions is verified using full-wave finite-element simulations. 10 - Possibilities offered by metamaterials in electromagnetic nondestructive evaluation [Show abstract] Raimond Grimberg, National Institute of R&D for Technical Physics, Romania Adriana Savin, National Institute of R&D for Technical Physics, Romania Rozina Steigmann, National Institute of R&D for Technical Physics, Romania Bogdan Serghiac, Al.I. Cuza University, Romania Alina Bruma, National Institute of R&D for Technical Physics; University of Birmingham, Romania; UK This paper proposes to study and to implements metamaterials that can serve as electromagnetic flux concentrators in the range of radio frequency into electromagnetic nondestructive examination. Thus, the using of a new type of metamaterials, namely conical Swiss roll has been proposed. 11 - Experimental verification of negative refraction of semiconductor-ferrite prism in millimeter waveband [Show abstract] Aleksey Girich, Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine, Ukraine Mikhaill Khodzitsky, Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine, Ukraine Sergey Tarapov, Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine, Ukraine The paper is devoted to experimental verification of negative refraction in magneto-tunable ferrite-semiconductor prism metamaterial in millimeter wave band. The left-handed behaviour of a metamaterial are demonstrated by measuring the power at the outputs of a H-type T-junction waveguide loaded with the prism type of 45-90-45 degree. The results show that when the external magnetic field is zero, most of the power is directed to the output port directly facing the input port, whereas when the magnetic field is 1830 Oe, most of the power at 22.4 GHz is directed to the output port perpendicular to the input axis. This indicates that the energy is bent by the prism by an angle of 45° with respect to the normal, which suggests a negative index of refraction. 12 - Simulation and measurements responses from combined circular SRR’s versus Combined Equilateral Triangle SRR’s on PTFE Substrate at X Band [Show abstract] Jose Everardo Juliao Ferreira, Instituto Tecnológico de Aeronáutica – ITA, Brazil José Edimar Oliveira, Instituto Tecnológico de Aeronáutica – ITA, Brazil Luiz de Andrade, Instituto de Aeronáutica e Espaço – IAE and Material Division (AMR-C), Brazil Mirabel Rezende, Instituto de Aeronáutica e Espaço – IAE and Material Division (AMR-C), Brazil Antônio da Cunha Migliano, Instituto de Estudos Avançados – IEAv, Brazil Macelo Perotoni, Universidade Federal do ABC – UFABC, Brazil In this paper we consider two kinds of 1D Structures made with ten Circular Split-Ring Resonators (SRRs) boards with 7 x 7 matrix each board and ten wires boards with 7 x 7 matrix each board, similarly we did the same arrangement for Equilateral Triangle SRR, both structures with Polytetrafluoroethylene (PTFE)/Woven Fiberglass substrate, all of them regarding their frequencies responses from free-space for transmission magnitude coefficient S21 for a normally incident plane wave in numerical simulation situation and free-space measurement in X Band. Then, will compare those results from both mediums. 13 - Metal-dielectric multilayer flat lens: [Show abstract] Tomasz Stefaniuk, University of Warsaw, Poland R. Kotyński, University of Warsaw, Poland T. Szoplik, University of Warsaw, Poland In numerical simulations we study the influence of experimentally achievable accuracies on the imaging properties of metal-dielectric multilayered flat lens. We consider random distribution of the layers thickness val-ues and experimental errors of permittivity measurements. The imaging properties are expressed in terms of co-herent amplitude Transfer Function and Point Spread Function. 14 - Amplitude and phase-resolved measurements of optical metamaterials in the mid-infrared by phase-locked time-domain spectroscopy [Show abstract] Daniel Bender, Sandia National Laboratories, United States Igal Brener, Sandia National Laboratories, Unites States Gregory Ten Eyck, Sandia National Laboratories, United States Joel Wendt, Sandia National Laboratories, United States Michael Sinclair, Sandia National Laboratories, United States We describe a time-domain spectroscopy system in the thermal infrared used for complete transmission and reflection characterization of metamaterials in amplitude and phase. The system uses a triple-output near-infrared ultrafast fiber laser, phase-locked difference frequency generation and phase-matched electro-optic sampling. We will present measurements of several metamaterials designs. 15 - Negative refraction in natural ferromagnetic metals [Show abstract] Sebastian Engelbrecht, University of Wuerzburg, Germany Alexey Shuvaev, University of Wuerzburg, Germany M. Wunderlich, University of Wuerzburg, Germany Andrei Pimenov, University of Wuerzburg, Germany In this presentation we demonstrate experimentally that in such natural metals as pure Co and FeCo alloy the negative values of the refractive index are easily achieved close to the ferromagnetic resonance. Details of experimental procedure and data processing will be discussed as well. 16 - Novel CRLH cells used in 1D and 2D leaky-wave antennas [Show abstract] Alexandru Bogdan Ochetan, Politehnica University of Bucharest, Romania Alina Cristina Bunea, National Research Institute for Microtechnologies, Bucharest, Romania George Lojewski, Politehnica University of Bucharest, Romania This paper presents novel CRLH cells designed to allow both 1D and 2D structures. The 1D cell can be simply expanded to a 2D cell by only adding an interdigital capacitor. The designed cells are then used in different radiating leaky-wave structures, their characteristics and performance being also presented. 17 - Faraday effect enhancement in heterostructures with magneto-optical metalsWithdrawal, [Show abstract] Lijuan Dong, Shanxi Datong University, China Lixiang Liu, Shanxi Datong University, China Yunlong Shi, Shanxi Datong University, China Transmission and Faraday rotation effect in the heterostructure consisting of an all-dielectric photonic crystal and a magnetic metal are studied theoretically. As a result, the transmission and Faraday rotation in the heterostructure are simultaneously booted due to the localized electromagnetic fields. 18 - Colossal magnetoelectric effect in split-ring metamaterials [Show abstract] Alexey Shuvaev, Universität Würzburg, Germany Andreas Schneider, Universität Bremen, Germany Sebastian Engelbrecht, Universität Würzburg, Germany Andrei Pimenov, Universität Würzburg, Germany A detailed investigation of a metamaterial medium made of split ring resonators was performed. The results obtained evidence the existence of linear magnetoelectic susceptibility which exceeds that of classical magnetoelectric materials by two orders of magnitude. The experimentally obtained terms of magnetoelectric tensor fit well with values predicted by equivalent circuit model. 19 - Tunable liquid-crystal metamaterial ground plane for 2-D sub-wavelength cavity leaky-wave antennasNo show, [Show abstract] Carolina Mateo-Segura, Loughborough University, United Kingdom Alexandros P. Feresidis, Loughborough University, United Kingdom George Goussetis, ECIT, Queen's University Belfast, United Kingdom Robert Cahill, ECIT, Queen's University Belfast, United Kingdom An electronically tunable high-impedance metamaterial ground plane and its application to a high-gain 2-D leaky-wave antenna is presented. A nematic state liquid crystal is inserted in the gap between the lower array and the ground plane. The radiation properties of this antenna are controlled by applying an external voltage bias that alters the intrinsic permittivity of the LC substrate and hence the reflection characteristics of the HIS ground. 20 - Unidirectional transmission through the subwavelength slit in metallic gratings [Show abstract] Semih Cakmakyapan, Bilkent University, Turkey Andriy Serebryannikov, Technische Universitaet Hamburg, Germany Humeyra Caglayan, Bilkent University, Turkey Ekmel Ozbay, Bilkent University, Turkey An approach for obtaining unidirectional transmission in non-symmetric metallic gratings with a single slit is suggested. At a proper choice of the grating parameters and frequency, transmission tends to zero if the struc-ture is illuminated from one side and is non-zero when illuminated from the other side. 21 - Tunable negative index metamaterial by ferritesNo show, [Show abstract] Ruixin Wu, Nanjing University, China Yin Poo, Nanjing University, China Da-yong Zhou, Nanjing University, China Guang-hua He He, Nanjing University, China Ai-min Jiang, Nanjing University, China In this work, we show the metamaterials based on ferrites have negative indices, and its magnitude and the frequency range are tunable in applied magnetic fields. The permeability and permittivity of the component materials, as well as the composite configuration, influence the tunabilty and the loss of the negative index. 22 - Excitation of surface plasmons in perforated Ag films [Show abstract] Wilfried Sigle, Max Planck Institute for Metals Research, Germany Jaysen Nelayah, Laboratoire Matériaux et Phénomènes Quantiques , France Christoph T. Koch, Max Planck Institute for Metals Research, Germany Burcu Ögüt, Max Planck Institute for Metals Research, Germany Peter A. van Aken, Max Planck Institute for Metals Research, Germany Using energy-filtering transmission electron microscopy we observe localized plasmon resonances in nanoholes of silver. Apart from resonances of single holes we find coupling effects between closely spaced holes and discuss these using a hybridization scheme. 23 - Enhanced diffraction of THz-waves on two-component nano-partiesNo show, [Show abstract] Gayk Igitkhanyan, Radio Technical Institute, Ural State Technical University, Russia B. A. Panchenko, Radio Technical Institute, Ural State Technical University, Russia Diffraction of linear THz-band electromagnetic wave on spherical nano-parties contained meta-materials is investigated. As an object the two-layer plasma particle, which composed of silicon (conventional dielectric) and silver layers (MTM), is considered. 24 - Numerical study of the definition of the Poynting vector in meta-materials [Show abstract] João Costa, University of Coimbra, Portugal Mário Silveirinha, University of Coimbra, Portugal Here, we report a numerical study that demonstrates that the Poynting vector can be defined in a self-consistent and unambiguous manner in terms of the macroscopic effective parameters.It is numerically shown that the spatially averaged microscopic Poynting vector can be accurately written in terms of the macroscopic electromagnetic fields and of a nonlocal dielectric function. 25 - Acoustic energy distribution in a dispersive and absorptive medium having simultaneously negative density and modulus [Show abstract] Chen-Yu Chiang, Department of Optics and Photonics, National Central University, Taiwan Pi-Gang Luan, Department of Optics and Photonics, National Central University, Taiwan The energy distribution in an acoustic metamaterial consisting of arrays of Helmholtz resonators and elas-tic membranes is investigated. Using the transmission line analogy, the effective mass density, effective modulus, and energy velocity are extracted. We discuss the influence of loss on the wave propagation properties and the determination of energy velocity. 26 - Millimeter wave transmission and reflection from metal-dielectric film nanocomposites CoX(SiO2)1-X and CoX(Al2O3)1-X [Show abstract] Anatoly Rinkevich, Institute of Metal Physics, Russia Dmitry Perof, Institute of Metal Physics, Russia Vladimir Vaskovsky, Ural State University, Russia Alexander Gorkovenko, Ural State University, Russia Transmission and reflection of millimeter waveband electromagnetic waves have been studied for thin film metal-dielectric Cox(Si02)1-x and Cox(Al2O3)1-x nanocomposites in which cobalt nanoparticles are placed inside of 100nm thickness SiO2 or Al2O3 film. Microwave properties of nanocomposite samples with different cobalt content have been measured in frequency range from 26 to 38 GHz. The frequency dependencies of transmission and reflection coefficients are obtained. Share of power loss in the samples was calculated. Variation of trans-mission coefficient in external magnetic field is studied. Obtained data were compared to magnetic properties. 27 - Artificial magnetic conductor loaded monopole antenna [Show abstract] Amir Jafargholi, K. N. Toosi University of Technology, Iran Manouchehr Kamyab, K. N. Toosi University of Technology, Iran In this paper, the use of artificial magnetic conductor (AMC) to load a monopole antenna has been investigated. It is known that the current reversal, that occurs at frequencies much beyond the antenna natural frequency, disturbs the omnidirectional radiation pattern of the monopole antenna. The current distribution of the monopole antenna can be improved to a large extent by using PMC loading. To this aim, the capacitively loaded loops (CLLs) are used to realize perfect magnetic conductor behavior. 28 - Beam transverse power flow reversing in extreme nonlinear metamaterials [Show abstract] Carlo Rizza, Dipartimento di Ingengneria Elettrica e dell'Informazione, Italy Alessandro Ciattoni, Consiglio Nazionale delle Ricerche, L'Aquila, Italy Elia Palange, Dipartimento di Ingengneria Elettrica e dell'Informazione, Italy We theoretically prove that electromagnetic beams propagating through a nonlinear cubic metamaterial can exhibit a power flow whose direction reverses its sign along the transverse profile. This effect is peculiar of the hitherto unexplored extreme nonlinear regime where the nonlinear response is comparable or even greater than the linear contribution, a condition achievable even at relatively small intensities. We propose a possible metamaterial structure able to support the extreme conditions where the polarization cubic nonlinear contribution does not act as a mere perturbation of the linear part. 29 - Analytical modelling and design of CW-LR type plasmonic metamaterial at millimetre-wave frequencyNo show, [Show abstract] Subal Kar, Institute of Radio Physics & Electronics, University of Calcutta, India Tapashree Roy, Institute of Radio Physics & Electronics, University of Calcutta, India Souvik Pal, Institute of Radio Physics & Electronics, University of Calcutta, India Promit Gangooly, Institute of Radio Physics & Electronics, University of Calcutta, India An analytical approach for design of Cut-Wire (CW) and Labyrinth Resonator (LR) combination type plasmonic metamaterial has been reported. The design is based on analytical model equations derived by us and the designed structure has been characterized to give a negative refractive index of (–1.84) at 35 GHz. 30 - Transparent in visible range 3D-photonic crystals, filled by dielectric or metal quantum dots [Show abstract] Vladimir Gorelik, Lebedev Physical Institute of Russian Academy of Sciences, Russia Transparent for visible emission 3D-photonic crystals, filled by dielectric or metal quantum dots, have been ob-tained on the base of quartz opal matrices. Reflectance and transmittance spectra of such type photonic crystals have been recorded. Essential narrowing of photonic band gap has been observed. 31 - Reconfigurable triangular split ring resonator with artificial neural network and genetic algorithm analysis [Show abstract] Vidyalakshmi Mandakolathur Ravi, National Institute of Technology, Tiruchirappalli, India Raghavan Singaravelu, National Institute of Technology,Tiruchirappalli, India A reconfigurable triangular split ring resonator (TSRR) consisting of concentric equilateral triangles and gaps in between is presented. The dimensions of the inner triangle are fixed. The gap in the outer triangle can be varied by means of a comb drive actuator connected to each of the conductor constituting the sides of the outer triangle. Thus the resonant frequency of the structure depends upon the position and the length of the gap of the outer triangle. The band at which the resonant frequencies were obtained includes K-band, Q-band and V-band of the millimetre wave region and hence has potential applications. An artificial neural network model was developed for the estimation of the resonant frequency of the structure. Binary Genetic algorithm (BGA) is also used for the optimization of the size of the resonator with respect to a particular resonant frequency. 32 - Electronically steerable CRLH leaky wave antenna with only one control voltage [Show abstract] Sebastian Held, University Duisburg-Essen, Germany Andre Rennings, University Duisburg-Essen, Germany Daniel Erni, University Duisburg-Essen, Germany A simple topology is used to integrate active devices (varactor diodes) into the unit cell of the CRLH transmission line structure. This allows for a tuning of the phase constant $eta$ at a fixed frequency unit[2.45]{GHz}, and, hence an effective control of the radiation angle of the leaky wave mode 33 - Towards low reflection microwave coatings with Lorentz dispersive metamaterials [Show abstract] Ali Eren Culhaoglu, German Aerospace Center, Germany Andrey Osipov, German Aerospace Center, Germany Peter Russer, Technische Universitaet Muenchen, Germany The possibilitiy of realizing planar and electrically thin low reflection coatings with artificial materials is investigated. The electromagnetic response of the material is described by an effective medium model with Lorentz dispersion. For a layer with predetermined permittivity, a condition for reducing reflection at a specific frequency and a method for tuning its permeability to the required value are given. The outlined procedure can be regarded as the first step in the design of low reflection metamaterial coatings at microwave frequencies. 34 - Coaxial circular waveguides with integrated frequency selective surface [Show abstract] Robin Todd, Queen's University of Belfast, United Kingdom David Linton, Queen's University of Belfast, United Kingdom Gary Stafford, Global Invacom LTD, United Kingdom Tao Huang, Global Invacom LTD, United Kingdom A coaxial circular waveguide design is created that composes two waveguides placed inside each other. A fre-quency selective surface is inserted between the waveguides to demonstrate how a frequency range can be pre-vented from travelling through the outer waveguide while permitting the higher band to propagate along the inner waveguide. 35 - Nonlinear gain and saturation effects in optical negative-index metamaterials [Show abstract] Sebastian Wuestner, University of Surrey, United Kingdom Andreas Pusch, University of Surrey, United Kingdom Kosmas Tsakmakidis, University of Surrey, United Kingdom Joachim Hamm, University of Surrey, United Kingdom Ortwin Hess, University of Surrey, United Kingdom We present a study of active, optically pumped metamaterials on the basis of a three-dimensional finite-difference time-domain (FDTD) model combined with a semi-classical description of a four-level system. The effective refractive index and figure of merit are retrieved and it is shown how optical pumping influences negative refraction. 36 - High Q-factor planar metamaterials based on asymmetric single split resonators [Show abstract] Ibraheem Al-Naib, Philipps-Universität Marburg, Germany Christian Jansen, Philipps-Universität Marburg, Germany Martin Koch, Philipps-Universität Marburg, Germany We report on asymmetric single split resonators, which feature a very high Q-factor and a small electrical size. Such resonators hold a great potential as unit cells for planar metamaterials. Furthermore, by applying Babinet’s principle, complementary structures were derived and analysed, which feature a bandpass instead of bandstop transmission response. 37 - A metamaterial structure with high tunability [Show abstract] Kelvin Nicholson, RMIT University, Australia Kamran Ghorbani, RMIT University, Australia A metamaterial with electronically tunable negative refractive index region is presented. The structure is loaded with commercial varactors operating over the C band. Tunability is achieved by applying an electric field across the unit cells. Measurement of the completed structure in a WR137 waveguide will be presented at the conference. 38 - A design of circularly polarized antenna with Fabry-Pérot cavity for high gainNo show, [Show abstract] Jeongho Ju, Antenna Research Team, Electronics and Telecommunications Research Institute, Korea (South) Dongho Kim, Antenna Research Team, Electronics and Telecommunications Research Institute, Korea (South) Wangjoo Lee, Antenna Research Team, Electronics and Telecommunications Research Institute, Korea (South) Jaeik Choi, Antenna Research Team, Electronics and Telecommunications Research Institute, Korea (South) A Fabry-Pérot cavity (FPC) antenna simultaneously producing a high gain and circularly polarized (CP) behav-iors is proposed. In order to increase antenna gain and obtain CP characteristics, unit cells used in the superstrate are composed of the square patch with a pair of truncated corners, and the superstrate is placed above the linearly polarized (LP) patch antenna including the ground plane with spacing of an approximately half wavelength at the operating frequency. 39 - Field-gradient-induced-transparency metamaterial [Show abstract] Yasuhiro Tamayama, Department of Electronic Science and Engineering, Kyoto University, Japan Toshihiro Nakanishi, Department of Electronic Science and Engineering, Kyoto University, Japan Yasuhiro Wakasa, Department of Electronic Science and Engineering, Kyoto University, Japan Tetsuo Kanazawa, Department of Electronic Science and Engineering, Kyoto University, Japan Kazuhiko Sugiyama, Department of Electronic Science and Engineering, Kyoto University, Japan Masao Kitano, Department of Electronic Science and Engineering, Kyoto University, Japan We investigate a dynamically controllable electromagnetically-induced-transparency-like metamaterial. The unit structure of the metamaterial consists of two types of resonators. The field gradient of the incident electromagnetic wave in the transverse direction induces coupling between these two types of resonators and causes a transparency phenomenon. 40 - Optical isolator based on 1D anisotropic photonic crystalNo show, [Show abstract] Konstantin Vytovtov, Dnepropetrovsk National University, Ukraine It is investigated a dependence of reflection coefficient on an anisotropy axis orientation for a 1D anisotropic photonic crystal. It is offered to create nonreciprocal optical devices based of reflection properties of a 1D anisotropic photonic crystal but not Faraday effect. 41 - Re-visit of electromagnetic view-points for metamaterialsNo show, [Show abstract] Tapashree Roy, Institute of Radio Physics and Electronics, University of Calcutta, Kolkata, India Subal Kar, Institute of Radio Physics and Electronics, University of Calcutta,Kolkata, India An analytical approach to investigate the electromagnetic properties like backward waves and evanescent wave amplification for metamaterials (LHM) by studying the wave impedance and transmission function has been presented. A comparative scenario for such properties related to natural (RHM), plasma media, besides LHM has been discussed for skew-overlapped design. 42 - Transverse and longitudinal coupling in SRR stacks [Show abstract] Jorge Carbonell, Universidad Politécnica de Valencia, Spain Eric Lheurette, Université des Sciences et Technologies de Lille, France Didier Lippens, Université des Sciences et Technologies de Lille, France The possibility to recover a left-handed transmission window for a transverse-coupled stacked split ring resonator array is pointed out numerically and verified experimentally by the measurement of the scattering parameters of array prototypes showing dual behaviours at microwaves. A transition from rejection to transmission is explained (i) by the necessary condition of the creation of a current loop for the anti-symmetric resonant mode along the propagation direction and (ii) the propagation of transverse magneto inductive waves. A comparison with a stack of sub-wavelength holes, for which a similar dual condition is required, is also discussed. 43 - Perfect imaging lens made by nonnegative metamaterialsWithdrawal, [Show abstract] Ma Yungui, Temasek Laboratories, National University of Singapore, Singapore CK Ong, Department of Physics, National University of Singapore, Singapore In this presentation, we will report a perfect imaging lens that can resolve a subwavelength source signal and rigorously form its image at several wavelength distances away. This lens allows using nature materials to realize its refractive index profile. It may find important technological applications such as nanolithography. 44 - Whispering gallery plasmon modes on silver ringsNo show, [Show abstract] Andreas Rottler, Universität Hamburg Institut für Angewandte Physik, Germany Markus Bröll, Universität Hamburg Institut für Angewandte Physik, Germany Stephan Schwaiger, Universität Hamburg Institut für Angewandte Physik, Germany Detlef Heitmann, Universität Hamburg Institut für Angewandte Physik, Germany Stefan Mendach, Universität Hamburg Institut für Angewandte Physik, Germany We discuss the excitation of surface plasmon polaritons on a silver tube. Using finite difference time domain simulations we show that these SPPs exhibit azimutal modes, similar to whispering gallery modes in dielectric tubes. Our simulations show that a thin gain layer on top of the silver tube enhances the field intensity as well as the quality factor of the modes. 45 - Novel uniplanar artificial magnetic conductor in the SHF band [Show abstract] María Elena de Cos Gómez, TSC. Dpto de Ingeniería Eléctrica, Universidad de Oviedo, Spain Yuri Álvarez, TSC. Dpto de Ingeniería Eléctrica, Universidad de Oviedo, Spain Ramona Hadarig, TSC. Dpto de Ingeniería Eléctrica, Universidad de Oviedo, Spain Fernando Las-Heras, TSC Dpto de Ingeniería Eléctrica, Universidad de Oviedo, Spain The design of a novel uniplanar Artificial Magnetic Conductor (AMC) in the SHF band, based in FEM simulations and measurements in an anechoic chamber, is presented. A prototype is manufactured and characterized based on reflection coefficient phase. The designed prototype shows broad AMC operation bandwidth and polarization angle independency. Its angular margin when operating under oblique incidence is also tested. 46 - Electromagnetic waves transmission and reflection by a multilayered waveguide structure containing metamaterial No show, [Show abstract] Muin Ubeid, Islamic Uiniversity of Gaza, Palestinian Authority Mohammed Shabat, Islamic Uiniversity of Gaza, Palestinian Authority We investigate the characteristics of electromagnetic wave transmission by multilayered structures consisting of a pair of left-handed material (LHM) and dielectric slabs inserted between two semi-infinite dielectric media. The theoretical aspect is based on Maxwell's equations and matching the boundary conditions for the electric and magnetic fields of the incident waves at each layer interface. We calculate the reflected and transmitted powers of the multilayered structure taking into account the widths of the slabs and the frequency dependence of permittivity and permeability of the LHM. The obtained results satisfy the law of conservation of energy. We show that if the semi-infinite dielectric media have the same refractive index and the slabs have the same width, then the reflected power can be minimized and the transmittance-frequency curve shows no ripple. On the other hand if the semi-infinite dielectric media have different values of refractive indices and the slabs have different widths, then under certain conditions the reflected power can be maximized. 47 - Unity absorbance layers - Optimal design criteria [Show abstract] Khattiya Chalapat, Low Temperature Laboratory, Aalto University, Finland Gheorghe Sorin Paraoanu, Low Temperature Laboratory, Aalto University, Finland Zhou Du, Department of Radio Science and Engineering, Aalto University, Finland Jarno Tervo, Department of Radio Science and Engineering, Aalto University, Finland Igor Nefedov, Department of Radio Science and Engineering, Aalto University, Finland Sergei Tretyakov, Department of Radio Science and Engineering, Aalto University, Finland We present the necessary and sufficient conditions for the unity absorbance of thin planar layers. With a simple structure comprising a double-layer grid, it is shown that zero transmission and reflection is feasible. The operational frequencies can be varied by tuning the grid impedances. Explicit conditions are given at the large wavelength limit; these underline the fundamental of ultra-thin perfect antennae and absorbers. 48 - Plasma frequency of millimeter waveband manganite-metamaterialNo show, [Show abstract] Sergey Tarapov, Institute of Radiophysics and Electronics, National Academy of Science, Ukraine Mikhail Khodzitsky, Institute of Radiophysics and Electronics, National Academy of Science, Ukraine Dmitry Belozorov, Institute for Theoretical Physics “Kharkov Institute of Physics & Technology”, Ukraine The paper is devoted to experimental detecting the plasma frequency of sintered strontium-doped lantha-num manganite, demonstrating the left handed properties. Namely, we studied in the millimeter waveband the frequency dispersion of spatially-dispersed manganite specimen , immersed into dielectric matrix. The plasma frequency of this one dimension (1D) metamaterial has been estimated by the frequency position of the zone of high transmission (the Double Negative Zone) for various dispersity of the specimen. The follow-up approxima-tion with the Drude law allowed the estimation of the plasma frequency of sintered manganite specimen
11:20 - 13:00 - Parallel session Tuesday 1
11:20 - Special session 4 Acoustic metamaterials [Show abstract]
Research on acoustic metamaterials is an emergent topic due to their potential applications in acoustics, ultrasonics and vibroacoustics. This structured session is devoted to review the recent advances on metamaterials based on resonant and non-resonant units. Homogenization theories explaining the extraordinary properties of these new systems as well as their possible applications will be covered. Works studying wave propagation through elastic and acoustic metamaterials are also welcome. Emphasis is also put on recent advances in cloaking, hyperlensing, subwavelength imaging, etc.
Organizer(s): Jose Sanchez-Dehesa, Universidad Politecnica de Valencia, Spain
Session chairperson(s): Jose Sanchez-Dehesa, Universidad Politecnica de Valencia, Spain
11:20 - 11:40 - Physical realization of anisotropic fluid-like metamaterials Invited [Show abstract] Daniel Torrent, Universidad Politécnica de Valencia, Spain José Sánchez-Dehesa, Universidad Politécnica de Valencia, Spain In this work we present some applications of anisotropic fluid-like metamaterials, mainly those regarding Acoustic Cloaking Devices and the so called ``Radial Wave Crystals''. It is shown how the requirements for building these metamaterials are quite restrictive, and some ideas about their fabrication from isotropic and homogeneous materials are analyzed. A physical realization of these type of structures is shown and their physical characterization is explained by means of some spectral-based experiments. Finally, it is explained how to export these results to into Electromagnetic Waves. 11:40 - 12:00 - Acoustic wave extraordinary reflection by acoustic-transparent thin plates with structures Invited [Show abstract] Zhaojian He, Department of Physics, Wuhan University, China Shasha Peng, Department of Physics, Wuhan University, China Han Jia, Department of Physics, Wuhan University, China Chunyin Qiu, Department of Physics, Wuhan University, China Manzhu Ke, Department of Physics, Wuhan University, China Zhengyou Liu, Department of Physics, Wuhan University, China We have studied the extraordinary reflection of thin epoxy plate with translational subwavelength cuts. We find that this extraordinary phenomenon is caused by the resonant response of the standing wave modes of the symmetric coupled Stoneley waves in the strips. 12:00 - 12:20 - Cloaking for water, bending and acoustic waves. Invited [Show abstract] Stefan Enoch, Institut Fresnel, CNRS and Université d'Aix-Marseille, France Mohamed Farhat, University of Texas at Austin, US André Diatta, Liverpool University, UK Sébastien Guenneau, Institut Fresnel, CNRS and Université d'Aix-Marseille, France Sasha Movchan, Liverpool University, UK Guillaume Dupont, Aix-Marseille Université, France We will review our recent work on cloaking for different types of waves. We will begin with linear surface water waves cloaking, then present cloaking for bending waves on thin plates and at last some recent results for acoustics. 12:20 - 12:40 - Anisotropic metamaterials for acoustic imaging Invited [Show abstract] Jensen Li, City University of Hong Kong, Hong Kong Lee Fok, University of California, Berkeley, USA Xiaobo Yin, University of California, Berkeley, USA Guy Bartal, University of California, Berkeley, USA Xiang Zhang, University of California, Berkeley, USA In this presentation, we will show how anisotropic acoustic metamaterials can be used to mold the flow of sound waves. In particular, an acoustic hyperlens that magnifies subwavelength objects by gradually converting evanescent to propagating waves will be demonstrated. 12:40 - 13:00 - Acoustic metamaterials with negative constituent parameters; ρNG, BNG and DNG metamaterials Invited [Show abstract] Chul Koo Kim, Yonsei University, Korea (South) Sam Hyeon Lee, Yonsei University, Korea (South) Choon Mahn Park, Anyang University, Korea (South) Yong Mun Seo, Myongji University, Korea (South) Zhi Guo Wang, Tongji University, China Acoustic metamaterials are characterized by effective constitutive parameters such as mass density and modulus. We have fabricated acoustic metamaterials with negative mass density (ρNG), negative modulus (BNG) and double negative (DNG) constituent parameters. Wide frequency ranges of negative density and modulus were obtained using arrays of thin elastic membranes and side holes separately. Combining the side holes and the membranes, we realized double negativity below a critical frequency. The transmission characteristics of these materials are presented. Realization of the reversed Doppler effect and acoustic cloaking using the present metamaterials are discussed.
11:20 - Session 4a Optical Metamaterials 3
Session chairperson(s): Stanley Burgos, Caltech, USA
11:20 - 11:40 - Plasmonic nanoparticles for near-field engineering Oral [Show abstract] Arash Rashidi, Northeastern University, USA Hossein Mosallaei, Northeastern University, USA The focus of this paper is to design an array of plasmonic nanoparticles manipulating desired near-field focusing pattern in optics. Dipole Mode and Green’s functions analysis are developed to recast a non-linear inverse scattering problem. The formulation provides advanced modeling capability for design optimization of plasmonic nanoparticles engineering near-field physics. 11:40 - 12:00 - Beam steering from a bi-mode nanoslit Oral [Show abstract] Choon How Gan, Laboratoire Charles Fabry de l'Institut d'Optique, France Philippe Lalanne, Laboratoire Charles Fabry de l'Institut d'Optique, France Jean-Paul Hugonin, Laboratoire Charles Fabry de l'Institut d'Optique, France A method for beam steering from a nanoslit is proposed. It depends on the interference between the fields scattered by the lowest order symmetric and antisymmetric modes in the nanoslit. Results from numerical simulations reveal the potential for a compact multiplexing device that can be integrated to optoelectronic systems. 12:00 - 12:20 - A route towards metamaterials in flexible substrates at visible wavelengths Invited [Show abstract] Andrea Di Falco, School of Physics and Astronomy, University of St Andrews, United Kingdom Martin Ploschner, School of Physics and Astronomy, University of St Andrews, United Kingdom Thomas Krauss, School of Physics and Astronomy, University of St Andrews, United Kingdom We discuss our recent results in the realization and characterization of metamaterials on flexible substrates at optical wavelengths (Metaflex). The fabrication procedure is outlined and preliminary experimental results are shown for different plasmonic structures, including nano-antennas and fishnet-type structures, showing the fea-sibility of our approach. 12:20 - 12:40 - Studying localized excitations with fast electrons Invited [Show abstract] F. Javier García de Abajo, Instituto de Óptica – CSIC, Spain Optical excitations in nanostructures are finding important applications in biosensing and information technologies. These advances rely on the ability to mold the flow of visible and near-infrared light over distances much smaller than the free-space wavelength. Exquisite control over photon energy (better than one part in 107) has been possible for a long time, and so has spatial control (better than one tenth of the wavelength) using surface modes such as plasmons. However, there is a shortage of tools capable of analyzing and/or generating optical excitations with the simultaneous combination of nanometer spatial resolution and sub-meV energy resolution. Here, we will describe recent achievements in this direction, relying on the coupling between photons and electrons that is mediated by the presence of nanostructures. Examples of plasmon mapping and plasmon generation will be presented using cathodoluminescence, electron energy-loss, and electron energy-gain spectroscopies. The application of these techniques to investigate effective optical constants and the properties of metamaterials will be discussed. 12:40 - 13:00 - Semiconductors as low-loss plasmonic materials at near-infrared wavelengths Invited [Show abstract] Alexandra Boltasseva, Technical University of Denmark, Denmark Gururaj Naik, Purdue University, USA Paul West, Purdue University, USA Satoshi Ishii, Purdue University, USA Naresh Emani, Purdue University, USA Vladimir Shalaev, Purdue University, USA Low loss plasmonic materials are essential for realization of novel metamaterial devices operating at commercially important wavelength of 1.55 μm. In this contribution we present a comparative overview of various plasmonic materials including metals, metal alloys and doped semiconductors outlining their optical properties and fabrication aspects thus providing a reference for those searching for better plasmonic materials for specific frequencies and applications. We show that wide band-gap semiconductors, such as zinc oxide and tin oxide, when heavily doped can be used as low loss plasmonic materials with a small magnitude of real permittivity in the near-infrared region. We discuss the challenges and optimizations involved in achieving such high performing thin films of conducting oxides.
11:20 - Session 4b Chiral and Bianisotropic Composites
Session chairperson(s): Constantin Simovski, Aalto University, Finland
11:20 - 11:40 - Chiral THz Metamaterial with Tunable Optical Activity Invited [Show abstract] Jiangfeng Zhou, Los Alamos National Laboratory, USA Rongkuo Zhao, Ames Laboratory and Department of Physics and Astronomy, Iowa State University, USA Costas Soukoulis, Ames Laboratory and Department of Physics and Astronomy, Iowa State University, USA Antoinette Taylor, Los Alamos National Laboratory, USA John O’Hara, Los Alamos National Laboratory, USA Optical activity in chiral metamaterials is demonstrated in simulation and shows actively tun-able giant polarization rotation at THz frequencies. Electric current distributions show that pure chirality is achieved by our bi-layer chiral metamaterial design. The chirality can be optically controlled by illumination with near-infrared light. 11:40 - 12:00 - Plasmons within metallic spiral nanostructures Oral [Show abstract] Mark Turner, Centre for Micro-Photonics, Australia Tim Davis, CSIRO, Australia Min Gu, Centre for Micro-Photonics, Australia Here we investigate plasmon modes within metallic spiral nanostructures. We use a semi-analytical electrostatic plasmon theory to calculate the plasmon modes within a metal spiral. The effects of the spiral geometry on these plasmon modes and the optical properties of the nanostructure are discussed. 12:00 - 12:20 - Chiral metamaterials characterisation using the wave propagation retrieval method Oral [Show abstract] Andrei Andryieuski, DTU Fotonik, Technical University of Denmark, Denmark Andrei Lavrinenko, DTU Fotonik, Technical University of Denmark, Denmark Radu Malureanu, DTU Fotonik, Technical University of Denmark, Denmark In this presentation we extend the wave propagation method for the retrieval of the effective properties to the case of chiral metamaterials with circularly polarised eigenwaves. The method is unambiguous, simple and provides bulk effective parameters. Advantages and constraints are discussed. 12:20 - 12:40 - Strong optical activity from twisted photonic metamaterials Oral [Show abstract] Manuel Decker, Karlsruhe Institute of Technology, Germany Rongkuo Zhao, Ames Laboratory and Department of Physics and Astronomy, Iowa State University, USA Costas Soukoulis, Ames Laboratory and Department of Physics and Astronomy, Iowa State University and Department of Materials Science and Technology, Research Center of Crete, USA, Greece Stefan Linden, Karlsruhe Institute of Technology, Germany Martin Wegener, Karlsruhe Institute of Technology, Germany We investigate two types of chiral photonic metamaterials composed of stacked layers of twisted crosses and stacked layers of twisted split-ring resonators, respectively. Coupling of the two functional layers allows in both cases for optical activity and circular dichroism. Numerical calculations based on a finite elements method are in excellent agreement with experiments. 12:40 - 13:00 - Rotary power of a fishnet-related metamaterial at 0.5 THz Oral [Show abstract] Eric Lheurette, IEMN-Université de Lille 1, France Shengxiang Wang, IEMN-Université de Lille 1, France Frédéric Garet, IMEP-LAHC Université de Savoie, France Jean-Louis Coutaz, IMEP-LAHC Université de Savoie, France Didier Lippens, IEMN-Université de Lille 1, France Rotary power of 1035°/ is demonstrated at 0.5 THz. Unlike previous studies published on this topic where the negative index is achieved by means of chiral patterns, the device employed here is based on a fishnet-like structure. The negative index behaviour has been experimentally demonstrated by means of Time Domain Spectroscopy (TDS) in the terahertz frequency range with transmission level close to unity. Considering these characteristics and technological feasibility, this study may lead to the design of efficient polarizers and dichroïc slabs for terahertz and infrared spectroscopies
14:30 - 16:10 - Parallel sessions Tuesday 2
14:30 - Special session 6 Scope and Limitations of Metamaterial Modelling [Show abstract]
The objectives of this Special Session entitled, “Scope and Limitations of Metamaterial Modeling,” is to review both semi--analytical and numerical techniques for modeling metamaterials, with a view to developing an understanding of the scopes and limitations of these techniques.
Organizer(s): Raj Mittra, Penn State University, United States
Session chairperson(s): Raj Mittra, Penn State University, United States
14:30 - 14:50 - Tensor metamaterials based on transmission-line networks Invited [Show abstract] Anthony Grbic, Radiation Laboratory, Department of Electrical Engineering and Computer Science, University of Michigan, USA Gurkan Gok, Radiation Laboratory, Department of Electrical Engineering and Computer Science, University of Michigan, USA In this presentation, we will introduce transmission-based metamaterials that that possess tensor effective material parameters. The propagation characteristics of these metamaterials will be derived analytically and validated through full-wave simulation. 14:50 - 15:10 - Electromagnetic modeling and limitations in the homogenization of metamaterials and metasurfaces Invited [Show abstract] Andrea Alu, The University of Texas at Austin, United States of America Nader Engheta, University of Pennsylvania, United States of America We discuss the proper electromagnetic modeling of various metamaterial geometries, formed by 2D and 3D arrays of inclusions, for applications ranging from negative-index of refraction to cloaking. We will discuss how advanced homogenization techniques and proper modeling of metamaterials may be able to capture, in several practical circumstances, the main physical mechanisms at the basis of the anomalous features of metamaterials and metasurfaces, without necessarily requiring an extensive numerical approach. On the other hand, we will show that simplistic retrieval and homogenization models may often provide inaccurate and limited results in the case of complex metamaterial geometries, and their use should be carefully considered in a variety of practical applications. 15:10 - 15:30 - On electromagnetic characterization of nanostructured metamaterials Invited [Show abstract] Constantin Simovski, Aalto University, Finland Sergei Tretyakov, Aalto University, Finland In this presentation we inspect the state of the modern literature in what concerns the electromagnetic characterization of linear properties of metamaterials. We focus on nanostructured metamaterials whose electro-magnetic characterization is most important since the price of potential errors is high. A classification of nanos-tructured materials is suggested and some conceptual problems related to their electromagnetic characterization are discussed. 15:30 - 15:50 - A look at the scope and limitations of metamaterials modeling based on the equivalent medium approach Invited [Show abstract] Raj Mittra, Penn State University, USA The objectives of this paper are to examine a number of commonly used metamaterial elements, with a view to developing guidelines for the use of Equivalent Medium Approach (EMA) to describe them in the context of analyzing various structures 15:50 - 16:10 - Edge effects in finite size resonant ring metamaterials Invited [Show abstract] Ricardo Marques, Universidad de Sevilla, Spain Mikhail Lapine, Universidad de Sevilla, Spain Lukas Jelinek, Czech Technical University in Prague, Czech Republic It is reported how finite size resonant ring metamaterials may present strong deviations from the expected behavior in the negative magnetic permeability region, even for moderate losses. This effect seems to be related with the excitation of magnetoinductive quasi-static resonances which are closely related to the “unphysical” resonances that may appear near sharp wedges in negative magnetic permeability continuous media.
14:30 - Session 6a Optical Metamaterials 1
Session chairperson(s): Costas M. Soukoulis, Ames Lab. / Iowa State Univ., USA
14:30 - 14:50 - Supercollimated and extremely directive radiation based on optical antimatter Invited [Show abstract] Vito Mocella, CNR-IMM Unità di Napoli, Italy Principia Dardano, CNR-IMM, Italy Ivo Rendina, CNR-IMM, Italy Stefano Cabrini, Molecular Foundry- Berkeley Labs, USA In this paper we will discuss two paired and very special properties of heterostructures composed by com-plementary media. Theory and experimental results for near infrared light (λ=1.55 μm) are presented, proving that, inside such special metamaterial, a very divergent input source is transformed into a strongly collimated beam in-plane and give an extremely directive scattered light out-of-plane, coupled with diffraction order of the grating composed alternating complementary media. 14:50 - 15:10 - Split ring resonators: from visible magnetic response to organic sensors Invited [Show abstract] Nigel Johnson, University of Glasgow, United Kingdom Basudev Lahiri, University of Glasgow, United Kingdom Ali Z. Khokhar, University of Glasgow, United Kingdom Richard M. De La Rue, University of Glasgow, United Kingdom Scott G. McMeekin, Glasgow Caledonian University, United Kingdom In this invited presentation we show that by replacing the metal gold with aluminium in the fabrication of arrays of similarly sized Split Ring Resonators (SRRs), a substantial shift in the spectral response is obtained. By using small ~100 nm sized ‘U’ shaped SRRs the polarization dependent LC peak (the magnetic response) is shifted to the visible spectrum - by employing SRRs made from aluminium, rather than gold. Also reported is the use of larger asymmetric SRRs for use as organic sensors. 15:10 - 15:30 - 3D chiral metamaterials enabling asymmetric transmission of linearly polarized light Oral [Show abstract] Christian Helgert, Institute of Applied Physics, Friedrich-Schiller-Universität Jena, Germany Christoph Menzel, Institute of Condensed Matter Theory and Solid State Optics, Friedrich-Schiller-Universität Jena, Germany Carsten Rockstuhl, Institute of Condensed Matter Theory and Solid State Optics, Friedrich-Schiller-Universität Jena, Germany Ernst-Bernhard Kley, Institute of Applied Physics, Friedrich-Schiller-Universität Jena, Germany Andreas Tünnermann, Institute of Applied Physics, Friedrich-Schiller-Universität Jena, Germany Falk Lederer, Institute of Condensed Matter Theory and Solid State Optics, Friedrich-Schiller-Universität Jena, Germany Thomas Pertsch, Institute of Applied Physics, Friedrich-Schiller-Universität Jena, Germany For the first time we experimentally demonstrate a 3D chiral optical metamaterial that unambiguously transmits visible light with a linear polarization state differently in forward and backward direction. Based on a consideration of symmetry properties of metamaterial unit cells we derive a simple criterion for asymmetric transmission in an arbitrary base system. 15:30 - 15:50 - Tunable and bistable negative optical index with square loops loaded with nonlinear materials Oral [Show abstract] Mohamed Farhat, University of Texas at Austin, Department of Electrical and Computer Engineering, United States Pai-Yen Chen, University of Texas at Austin, Department of Electrical and Computer Engineering, United States of America Andrea Alu, University of Texas at Austin, Department of Electrical and Computer Engineering, United States of America In this paper, we present a design of sub-wavelength square inclusions that exhibit strong magnetic dipole at their resonance frequency that may be tuned as a function of their geometry (width of the gap) and the dielectric constant of the load, offering the possibility to tune its magnetic resonance in the optical range. The metamaterial, obtained by arranging periodically these nano-inclusions, is numerically demonstrated to have a negative refractive index in the optical range. In addition, the local electric field inside the structure could be many orders of magnitude larger than the one of the impinging wave, which may be employed to enhance nonlinear optical effects. We have investigated this possibility by employing a Kerr nonlinear material, showing possibility of optical bistability of optical negative index. 15:50 - 16:10 - Applications of 3D metamaterials in the optical wavelength range Invited [Show abstract] Harald Giessen, 4th Physics Institute, University of Stuttgart, Germany Na Liu, 4th Physics Institute, University of Stuttgart, Germany Thomas Weiss, 4th Physics Institute, University of Stuttgart, Germany Martin Mesch, 4th Physics Institute, University of Stuttgart, Germany Patrick Mai, 4th Physics Institute, University of Stuttgart, Germany Cornelius Grossmann, 4th Physics Institute, University of Stuttgart, Germany Andreas Tittl, 4th Physics Institute, University of Stuttgart, Germany We demonstrate applications of 3D metamaterials in the optical wavelength range. In particular, we demonstrate three different types of optical sensors based on plasmonic structures and metamaterials.
14:30 - Session 6b Tunable, Reconfigurable, and Nonlinear Metamaterials 2
14:30 - 14:50 - Nonlinear wave scattering by anisotropic dielectric slabs Oral [Show abstract] Oksana Shramkova, Institute for Radiophysics and Electronics of the National Academy of Sciences of Ukraine, Ukraine Aleksey Bulgakov, Institute for Radiophysics and Electronics of the National Academy of Sciences of Ukraine, Ukraine Alex Schuchinsky, Queen’s University Belfast, UK The harmonic and combinatorial frequency generation by the nonlinear dielectric slabs illuminated by the plane waves of two tones is examined. The effect of the physical and geometrical parameters of the layers on the intensities of the reflected and transmitted waves of combinatorial frequencies is considered. 14:50 - 15:10 - Stability analysis of active magnetoinductive materials Oral [Show abstract] Khalid Rajab, Queen Mary University of London, United Kingdom Yang Hao, Queen Mary University of London, United Kingdom Clive Parini, Queen Mary University of London, United Kingdom Javier Vazquez, ERA Technology Ltd (trading as Cobham Technical Services), United Kingdom Mike Philippakis, ERA Technology Ltd (trading as Cobham Technical Services), United Kingdom Simon Wilmot, ERA Technology Ltd (trading as Cobham Technical Services), United Kingdom Robert Pearson, ERA Technology Ltd (trading as Cobham Technical Services), United Kingdom In this presentation the stability of an effective media composed of actively-loaded loops is investigated. A circuit model of the loop includes the active loading, which is represented by non-Foster circuit parameters with negative values of R, L and C. An impedance matrix includes the effects of mutual coupling between the loops, and it is shown that the eigenvalues of this impedance matrix can be used to determine the stability of the system, either with the use of numerical root-finding techniques, or analytically using the Routh-Hurwitz criterion. Finally, FDTD simulations are used to verify stability. These stability results must necessarily be incorporated into the design of a non-Foster metamaterial. 15:10 - 15:30 - Tuning linear, chiral and nonlinear metamaterials through near-field interaction Invited [Show abstract] Ilya Shadrivov, Australian National University, Australia We analyze the near-field interaction between the resonant sub-wavelength elements of a metamaterial, and present a method to calculate the electric and magnetic interaction. We use the results of this analysis to explain the experimentally observed tuning of microwave metamaterials. 15:30 - 15:50 - Engineering the Kerr response through metamaterials: extreme electromagnetic nonlinear regime Oral [Show abstract] Alessandro Ciattoni, Consiglio Nazionale delle Ricerche, CNR-SPIN , Italy Carlo Rizza, Dipartimento di Ingegneria Elettrica e dell'Informazione, Università dell'Aquila, L'Aquila, Italy Elia Palange, Dipartimento di Ingegneria Elettrica e dell'Informazione, Università dell'Aquila, L'Aquila, Italy We consider a sub-wavelength periodic layered medium whose slabs are filled by arbitrary linear metamaterials and standard nonlinear Kerr media and we show that the homogenized medium behaves as a Kerr medium whose parameters can assume values not available in standard materials. In the situation where the effective permittivity is very small, we discuss the feasibility of the extreme nonlinear regime where the nonlinear polarization is comparable with the linear part of the overall dielectric response. We probe the novel regime through a class of nonlinear guided waves which are allowed to propagate even if $epsilon0$ and which exhibit a peculiar hyper-focusing dynamics. 15:50 - 16:10 - Optical metamaterials and metasurfaces formed by nanoantennas Oral [Show abstract] Pai Yen Chen, Department of Electrical and Computer Engineering, University of Texas at Austin, USA Andrea Alu, Department of Electrical and Computer Engineering, University of Texas at Austin, USA We analyze here the scattering and effective homogenized properties of individual and collections of optical nanoantennas loaded with nonlinear Kerr nanoparticles. In particular, we envision the employment of these nanoantennas for the realization of metasurfaces and metamaterials with enhanced nonlinear properties, obtained by exploiting the dramatic, and largely controllable, field enhancement at the nanoantenna gap. We show that the inherent bistability and self-tunability effects associated with their nonlinear behavior may drastically enhance the available degrees of freedom of linear optical metamaterials and metasurfaces, enabling fascinating applications for novel optical nanodevices and self-tunable metamaterials.
16:10 - 16:30 - Coffee break and poster session 1 (continuation)
16:30 - 18:10 - Parallel session Tuesday 4
16:30 - Special session 9 Optical Metamaterials [Show abstract]
Since the birth of the negative index metamaterials field, there are many efforts to extend the frequency of operation of such materials from the microwaves to the optical regime, targeting mainly telecommunications and imaging-related applications. These efforts though encounter serious challenges, stemming mainly from the non-perfect conductor behavior of the metal (which is the basic constituent of todays metamaterials) in the optical regime and the high losses involved, as well as from the current limitations in the fabrication capabilities which make difficult the fabrication of submicron and nanoscale structures. The session aims to review the efforts to face the above mention challenges and to highlight the recent progress in the field of optical metamaterials. Novel phenomena, structures, fabrication techniques and capabilities, as well as newly discovered possibilities of optical metamaterials will be also discussed.
Organizer(s): Maria Kafesaki, Foundation for Research and Technology Hellas (FORTH), Greece
Session chairperson(s): Maria Kafesaki, Foundation for Research and Technology Hellas (FORTH), Greece
16:30 - 16:50 - Weakly and strongly coupled optical metamaterials Invited [Show abstract] Costas M. Soukoulis, Ames Lab. / Iowa State Univ., USA In the last decade, a new area of photonics research has emerged, that has given the ability to produce materials with entirely novel electromagnetic properties. Known as metamaterials for their ability to take beyond conventional materials. Clearly, the field of metamaterials can develop mould-breaking technologies for a plethora of applications, where control over light (or more generally electromagnetic radiation) is a prominent ingredient—among them telecommunications, solar energy harvesting, biological and THz imaging and sensing, optical isolators and polarizers. In this talk, I give an introduction into this emerging field, review recent progress, and highlight remaining challenges and opportunities. 16:50 - 17:10 - Metamaterials: Transforming theory into reality Invited [Show abstract] Vladimir Shalaev, Purdue University, USA S. Xiao, Purdue University, USA V. Drachev, Purdue University, USA A. Kildishev, Purdue University, USA Loss-free and active metamaterials can enable a new powerful paradigm of engineering space for light with transformation optics, leading to a family of new applications ranging from a planar hyperlens to optical black hole. 17:10 - 17:30 - Plasmon induced transparency in optical metamaterials Invited [Show abstract] Shuang Zhang, University California, Berkeley, USA Yuan Wang, University California, Berkeley, USA Yong-shik Park, University California, Berkeley, USA xiaobo yin, University California, Berkeley, USA ziliang ye, University California, Berkeley, USA Thomas Zentgraf, University California, Berkeley, USA Guy Bartal, University California, Berkeley, USA Xiang Zhang, University California, Berkeley, USA We investigate a plasmonic system with a transparency induced by the coherent coupling between a radiative and a dark plasmonic element. The measurement of transmission spectrum shows a transparency window within a broad absorption band, i.e. plasmon induced transparency, serving as an evidence of the destructive interference between alternative excitation pathways. 17:30 - 17:50 - Three-dimensional photonic metamaterials made by direct laser writing Invited [Show abstract] Justyna K. Gansel, Institut für Angewandte Physik and DFG-Center for Functional Nanostructures (CFN), Karlsruhe Institute of Technology, Germany Michael Thiel, Institut für Angewandte Physik and DFG-Center for Functional Nanostructures (CFN), Karlsruhe Institute of Technology, Germany Michael S. Rill, Institut für Angewandte Physik and DFG-Center for Functional Nanostructures (CFN), Karlsruhe Institute of Technology, Germany Manuel Decker, Institut für Angewandte Physik and DFG-Center for Functional Nanostructures (CFN), Karlsruhe Institute of Technology, Germany Klaus Bade, Institut für Angewandte Physik and DFG-Center for Functional Nanostructures (CFN), Karlsruhe Institute of Technology, Germany Volker Saile, Institut für Angewandte Physik and DFG-Center for Functional Nanostructures (CFN), Karlsruhe Institute of Technology, Germany Sven Burger, Zuse Institute and DFG Forschungszentrum Matheon, Berlin, Germany Georg von Freymann, Institut für Angewandte Physik and DFG-Center for Functional Nanostructures (CFN), Karlsruhe Institute of Technology, Germany Stefan Linden, Institut für Angewandte Physik and DFG-Center for Functional Nanostructures (CFN), Karlsruhe Institute of Technology, Germany Martin Wegener, Institut für Angewandte Physik and DFG-Center for Functional Nanostructures (CFN), Karlsruhe Institute of Technology, Germany We review our recent experimental progress regarding the fabrication and characterization of three-dimensional metallic metamaterials operating at optical frequencies. 17:50 - 18:10 - Amorphous bulk metamaterials Invited [Show abstract] Carsten Rockstuhl, Institute of Condensed Matter Theory and Solid State Optics; Friedrich-Schiller-Universität Jena, Germany C. Menzel, Institute of Condensed Matter Theory and Solid State Optics; Friedrich-Schiller-Universität Jena, Germany S. Mühlig, Institute of Condensed Matter Theory and Solid State Optics; Friedrich-Schiller-Universität Jena, Germany C. Helgert, Institute of Applied Physics; Friedrich-Schiller-Universität Jena, Germany B. Walther, Institute of Applied Physics; Friedrich-Schiller-Universität Jena, Germany A. Chipouline, Institute of Applied Physics; Friedrich-Schiller-Universität Jena, Germany C. Etrich, Institute of Applied Physics; Friedrich-Schiller-Universität Jena, Germany E.-B. Kley , Institute of Applied Physics; Friedrich-Schiller-Universität Jena, Germany T. Pertsch, Institute of Applied Physics; Friedrich-Schiller-Universität Jena, Germany F. Lederer, Institute of Condensed Matter Theory and Solid State Optics; Friedrich-Schiller-Universität Jena, Germany We summarize our recent experimental and theoretical activities on amorphous metamaterials. They consist of aperiodically arranged strongly scattering metaatoms and can be fabricated either by bottom-up or top-down approaches. They promise to solve some of the most pertinent issues in metamaterial research.
16:30 - Session 9a Analytical and Numerical Modelling 1
Session chairperson(s): Anthony Grbic, Dept. of EECS,University of Michigan, Anguilla
16:30 - 16:50 - Optical forces on Rayleigh particles covered by metamaterial shells Invited [Show abstract] Simone Tricarico, University “Roma Tre”, Department of Applied Electronics, Italy Filiberto Bilotti, University “Roma Tre”, Department of Applied Electronics, Italy Lucio Vegni, University “Roma Tre”, Department of Applied Electronics, Italy In this contribution, we investigate the effects of the scattering cancellation phenomenon on the optical forces acting on cloaked nanoparticles in the visible regime. Adopting Maxwell’s stress tensor approach, we propose a theoretical analysis of the mechanical forces exerted on electrically small scatterers covered by conformal metamaterial covers. 16:50 - 17:10 - Assembling metamaterials - A building block approach for conductively or near-field coupled plasmonic entities Oral [Show abstract] Joerg Petschulat, Institute of Applied Physics, Friedrich-Schiller-Universitaet Jena, Germany Arkadi Chipouline, Institute of Applied Physics, Friedrich-Schiller-Universitaet Jena, Germany Christoph Menzel, Institute of Condensed Matter Theory and Solid State Optics, Friedrich-Schiller-Universitaet Jena, Germany Thomas Paul, Institute of Condensed Matter Theory and Solid State Optics, Friedrich-Schiller-Universitaet Jena, Germany Carsten Rockstuhl, Institute of Condensed Matter Theory and Solid State Optics, Friedrich-Schiller-Universitaet Jena, Germany Andreas Tuennermann, Institute of Applied Physics, Friedrich-Schiller-Universitaet Jena, Germany Falk Lederer, Institute of Condensed Matter Theory and Solid State Optics, Friedrich-Schiller-Universitaet Jena, Germany Thomas Pertsch, Institute of Applied Physics, Friedrich-Schiller-Universitaet Jena, Germany We describe metamaterials on the basis of its isolated meta-molecule properties. Thereby we investigate optical activity, electromagnetically induced transparency analogues, since both corresponding meta-molecules exhibit different intrinsic coupling mechanisms. Finally we show how new meta-molecules having completely different optical properties can be assembled with this method. 17:10 - 17:30 - Surface integral-equation formulation for the simulation of left-handed metamaterials Oral [Show abstract] Javier Rivero, Universidad de Extremadura, Spain José Manuel Taboada, Universidad de Extremadura, Spain Luis Landesa, Universidad de Extremadura, Spain In this paper, we propose the use of surface integral equation formulations derived from Maxwell’s equations to describe and solve problems involving left-handed materials. Using the standard method of moments procedure, the problem is solved by finding the equivalent electric and magnetic current densities on the LHM surfaces. 17:30 - 17:50 - Spatial nonlocality in the optical response of metal nanoparticles Oral [Show abstract] Christin David, CSIC - Instituto de Óptica, Spain F. Javier García de Abajo, CSIC - Instituto de Óptica, Spain Spatial nonlocality is known to play an important role at distances of a few nanometers, but few efforts have been made to rigorously investigate nonlocal effects. We present two theoretical approaches to to nonlocality and show that both models produce sizable nonlocal effects in single metal nanoparticles as well as in dimers. 17:50 - 18:10 - Efficient integral-equation analysis of broadband metamaterials Invited [Show abstract] Nilufer Ozdemir, Universite Catholique de Louvain, Belgium Rosa Mateos, Université catholique de Louvain, Belgium Christophe Craeye, Université catholique de Louvain, Belgium This paper focuses on the array scanning method and eigenmode analysis for the efficient numerical analysis of broadband metamaterials with the help of the Method of Moments. Two different applications are considered: design of a ground plane, which behaves as a magnetic conductor that supports leaky waves, and wire-medium metamaterial to realize sub-wavelength imaging at optical frequencies.
16:30 - Session 9b Experimental Techniques for Metamaterials
Session chairperson(s): Stefan Linden, Universität Bonn, Germany
16:30 - 16:50 - Experiments on superconducting metamaterial-Induced transparency Oral [Show abstract] Steven Anlage, University of Maryland, USA Cihan Kurter, University of Maryland, USA Alexander Zhuravel, B. Verkin Institute for Low Temperature Physics & Engineering, National Academy of Sciences of Ukraine, Ukraine Alexey Ustinov, Physikalisches Institut, Universität Karlsruhe, Germany Lei Zhang, Ames Laboratory-U.S. DOE, and Department of Physics and Astronomy, Iowa State University, USA Thomas Koschny, Ames Laboratory-U.S. DOE, and Department of Physics and Astronomy, Iowa State University, USA Costas Soukoulis, Ames Laboratory-U.S. DOE, and Department of Physics and Astronomy, Iowa State University, USA We have designed and built a simple low-loss metamaterial structure to demonstrate the effect of metamaterial-induced transparency using superconducting and normal metal resonators. The measured structure is low-loss and strongly dispersive in the vicinity of the transparency feature, in good agreement with simulations. 16:50 - 17:10 - Novel nonlinear optical effects reveal the handedness in nanopatterned gold films Oral [Show abstract] Ventsislav Valev, Katholieke Universiteit Leuven, Belgium Alejandro Silhanek, Katholieke Universiteit Leuven, Belgium Nick Smisdom, University of Hasselt, Belgium Ben De Clercq, University of Hasselt, Belgium W. Gillijns, Katholieke Universiteit Leuven, Belgium Oleg Aktsipetrov, Moscow State University, Russia Marcel Ameloot, University of Hasselt, Belgium Victor Moshchalkov, Katholieke Universiteit Leuven, Belgium Thierry Verbiest, Katholieke Universiteit Leuven, Belgium We show that SHG (Second Harmonic Generation) microscopy reveals the handedness of chiral, G-shaped nanostructures made of gold. The SHG response originates in localized sources, or hotspots, displaying a pattern that reverses with the handedness of the material. While excitation with linearly polarized light yields a SHG response from each individual nanostructure, circularly polarized light leads to a collective response from four nanostructures. The SHG hotspots likely originate in enantiomerically sensitive plasmon modes. 17:10 - 17:30 - Metamaterial technologies in the infrared regionWithdrawal, Invited [Show abstract] Didier Lippens, Institut d’Electronique, de Microélectronique et de Nanotechnologies (IEMN) Université des Sciences et Technologie de Lille, France We review the various technologies of metamaterials aimed at operating in the Infra-Red (IR) from the far to the near IR spectral regions. Firstly, highly anisotropic microstructures will be considered under grazing and front side illuminations with two relevant examples of omega–type and sub-wavelengths hole arrays operating at FIR. Then, we report on the development of open ring resonators arrays for a MIR operation starting from a Fre-quency Selective Surface. At last, the use a photonic crystal technology and more generally of a full dielectric approach, taking benefit of Mie resonances, will be discussed. 17:30 - 17:50 - Optical loss compensation: resonant energy transfer from gain media to meta-subunits Oral [Show abstract] Giuseppe Strangi, Department of Physics, University of Calabria, Rende, Italy Antonio de Luca , Department of Physics, University of Calabria, Rende, Italy Nicola Scaramuzza, Department of Physics, University of Calabria, Rende, Italy Roberto Comparelli, Università degli Studi di Bari - Dipartimento di Chimica, Italy Miguel Angel Correa Duarte, Colloid Chemistry Group - University of Vigo, Spain Serge Ravaine, Centre de Recherche Paul Pascal , CNRS, University Faculty Bordeaux 1, France Roberto Bartolino , Department of Physics, University of Calabria, Rende, Italy This work is aimed to experimentally investigate resonant energy transfer from organic gain materials to noble metal nanoparticles properly designed to create optical metamaterials via self-assembling routes. Multiple ex-perimental investigations show that losses at optical frequencies, mainly due to plasmon-radiation field coupling, can be partly compensated. Resonant excitation energy transfer occurs via non-radiative process, by proper over-lapping gain and plasmonic spectra and by optimizing size-ratios. The gain assistance of plasmonic elements through non-radiative processes is emphasized by Fluorescence quenching, enhanced Scattering Rayleigh, miti-gation of radiation damping and related radiative and non-radiative effects. 17:50 - 18:10 - Graphene superstrates for metamaterials Oral [Show abstract] Nikitas Papasimakis, Optoelectronics Research Centre, University of Southampton, United Kingdom Zhiqiang Luo, Nanyang Technological University, Singapore Ze Xiang Shen, Nanyang Technological University, Singapore Francesco De Angelis, Italian Institute of Technology, Italy Enzo Di Fabrizio, Italian Institute of Technology, Italy Andrey E. Nikolaenko, Optoelectronics Research Centre, University of Southampton, United Kingdom Nikolay I. Zheludev, Optoelectronics Research Centre, University of Southampton, United Kingdom The electromagnetic properties of a photonic metamaterial are dramatically modified by a graphene monolayer superstrate. The strong polarizability of the graphene layer combined with the Fano-type, resonant plasmonic modes supported by the metamaterial leads to substantial red-shift of the narrow metamaterial reso-nances. These frequency shifts translate to multi-fold increase in the measured transmission at a specific wave-length. In our experiments we used chemical vapor deposited (CVD) graphene on structurally related metamate-rial samples with plasmonic modes at different wavelength positions covering a spectral range from 1600 nm to 1800 nm .
18:10 - 18:30 - Break
18:30 - 19:30 - Special event - 'Unusual phenomena of a usual day' by Tomas Tyc [Show abstract]
08:20 - 10:00 - Parallel sessions Wednesday 1
08:20 - Special session 1 Super and Hyperimaging [Show abstract]
Conventional imaging techniques are bounded by the usual diffraction limit so that they cannot be applied to detect object features smaller than half of working wavelength. Recent advances in metamaterials and plasmonics have made it possible to construct new imaging devices to beat the diffraction limit, with the ideas of super and hyper imaging. This special session will bring together several scientists working in this field, to present the most recent advances in the fundamentals and applications of the super and hyper imaging. Interesting applications to acoustic-wave focusing and detecting the ultra-small optical mode at the far field will be presented, and new functional imaging devices that can work in an ultra-wide frequency regime will also be introduced. In addition, the special session will also discuss some intrinsic theoretical problems related to the super and hyper imaging.
Organizer(s): Lei Zhou, Fudan University, China
Session chairperson(s): Lei Zhou, Fudan University, China
08:20 - 09:00 - Metamaterial for Superlens and Hyperlens Keynote [Show abstract] Nicholas X. Fang, University of Illinois at Urbana-Champaign, USA Pratik Chaturvedi, University of Illinois at Urbana-Champaign (currently at Intel), USA Kin Hung Fung, University of Illinois at Urbana-Champaign, USA Shu Zhang, University of Illinois at Urbana-Champaign (currently at MtronPTI), USA Xu Jun, University of Illinois at Urbana-Champaign, USA In this keynote talk, I will discuss our progress of making artificial metamaterials for optical and acoustic imaging purposes. We demonstrated, for the first time, focusing ultrasound through metamaterials made of sub-wavelength Helmholtz resonator arrays. Furthermore, using smooth silver as an optical superlens, we recently demonstrated imaging with 38nm resolution, or 1/10 of the illumination wavelength. These plasmonic structures indeed promise exciting avenues to highly compact nanoscale optical imaging and communication devices. 09:00 - 09:20 - Far-field measurement of ultra-small plasmonic mode volume using an optical force analysis Invited [Show abstract] Shuang Zhang, Univ California, Berkeley, USA Yong-shik Park, Univ California, Berkeley, USA Yongmin Liu, Univ California, Berkeley, USA Thomas Zentgraf, Univ California, Berkeley, USA Xiang Zhang, Univ California, Berkeley, USA we develop a non-pertubative technique to experimentally determine the mode volume of plasmonic resonators in the far field through a unique optical force method. 09:20 - 09:40 - Image formation of an object under external illumination in front of a negative index slab Invited [Show abstract] Che Ting Chan, Hong Kong University of Science and Technology, Hong Kong J.W. Dong, Sun Yat Sun University, China Hui Huo Zheng, Hong Kong University of Science and Technology, Hong Kong We will examine the issue of image formation of an object placed in front of a negative index slab, and see under what circumstances should we see an image as predicted by the complementary media concept and under what circumstances would the object become invisible and thus no image is formed. 09:40 - 10:00 - Employ a fractal plasmonic metamaterial to realize subwavelength imaging Invited [Show abstract] Lei Zhou, Fudan University, China In this talk, we discuss how to employ a fractal plasmonic metamaterial to realize near-field subwavelength imaging. We first show that a metallic plate with periodic fractal-shaped slits can be homogenitized as a plas-monic metamaterial, which supports both transverse-electric and transverse-magnetic surface plasmons at fre-quencies determined by the fractal geometry. We then demonstrate that this structure can be employed to focus light sources with all-dimensional subwavelength resolution and enhanced field strengths. Microwave experi-ments reveal that the best achievable resolution is only , and finite-difference-time-domain simulations demonstrate that similar effects can be realized at infrared frequencies with appropriate designs.
08:20 - Session 1a Metamaterial Applications in Microwave Engineering
Session chairperson(s): Silvio Hrabar, University of Zagreb, Croatia
08:20 - 08:40 - Review of some transformation-optics and illusion-optics devices made of metamaterials Invited [Show abstract] Tie Jun Cui, Southeast University, China Hui Feng Ma, Southeast University, China Qiang Cheng, Southeast University, China Wei Xiang Jiang, Southeast University, China In this presentation we will show the recent progress on metamaterial researches conducted at Southeast University, China. We will present some new illusion-optics devices, the electromagnetic black hole, the two-dimensional (2D) compact-size broadband carpet cloak, the three-dimensional (3D) broadband carpet cloak, 2D and 3D gradient-index planar lens antennas, and Luneburg lens antenna, all of which are made of metamaterials. 08:40 - 09:00 - Tuneable microwave resonators and filters on combination of right/left handed transmission line sections for multiband applications Oral [Show abstract] Kirill Zemlyakov, St. Petersburg Electrotechnical University, Russia Irina Vendik, St. Petersburg Electrotechnical University, Russia A new approach to the design of multiband resonators and filters controlled by variable capacitors is presented. Different combinations of cascaded right- and left-handed transmission line sections are considered. A novel metamaterial structure for multiband resonators is suggested. Tuneable multiband resonator and filter are simulated, the LTCC structure of tunable dual-band resonator is designed and modeled. 09:00 - 09:20 - Partial focusing of electromagnetic radiation by a planar lens formed by crossed metallic wires Oral [Show abstract] Tiago Morgado, Departamento de Engenharia Electrotécnica e Computadores da Universidade de Coimbra, Instituto de Telecomunicações, Portugal Mário Silveirinha, Departamento de Engenharia Electrotécnica e Computadores da Universidade de Coimbra, Instituto de Telecomunicações, Portugal Here, we numerically demonstrate electromagnetic focusing using a metamaterial formed by nonconnected crossed metallic wires. It is shown that the focusing effect is a consequence of the phenomenon of broadband all-angle negative refraction that occurs at an interface between the nonlocal material and a regular dielectric. We describe our ongoing investigation on the focusing properties of the crossed wires lens, highlighting new possibilities and configurations. 09:20 - 09:40 - High-power metamaterial-based CRLH waveguide –state of the art and possible applications Oral [Show abstract] Silvio Hrabar, University of Zagreb, Croatia Helga Kumric, University of Stuttgart, Germany Walter Kasparek, University of Stuttgart, Germany Davor Zaluski, University of Zagreb, Croatia The basic properties of high-power CRLH waveguide based on Resonant-slot Coupled Cavity Chain are reviewed. It is experimentally shown that previously observed problems of achieving a stable balanced mode can be overcome by optimized design and precise machining, which enables possible applications in various experiments in plasma physics. 09:40 - 10:00 - Electrically small, omnidirectional GPS antenna using a split ring resonator Invited [Show abstract] Vasundara Varadan, University of Arkansas, USA Michael Buscher, University of Arkansas, USA Inkwang Kim, University of Arkansas, USA Atanu Dutta, University of Arkansas, USA Bryan McLaughlin, Charles Stark Draper Laboratory, USA Douglas White, Charles Stark Draper Laboratory, USA An electrically small (/10), omnidirectional GPS antenna has been designed using very small dipole antenna (/30) coupled to a split ring resonator. The design was optimized using full wave simulation in Ansoft HFSS. The antenna was fabricated on a very thin substrate (0.25 mm) and the size of the resulting antenna is 20mm x 20mm compared to the free space wavelength of 200 mm at the GPS design frequency. The gain of the antenna ~ 0 dB and the radiation pattern is omnidirectional. The radiation efficiency of the antenna was measured using a modified Wheeler cap. This antenna is a good example of how a metastructure can be used to realize electrically small antennas at low frequencies where the large size and weight of a conventional antenna is a major handicap in many applications
08:20 - Session 1b Applications of Photonic Chrystals and EBGs
Session chairperson(s): Ekmel Ozbay, Bilkent University, Turkey
08:20 - 08:40 - Tailored TE11 EBGs for monomodal TEM operation in an overmoded coaxial transmission line Oral [Show abstract] Christoph Neumaier, Spinner GmbH, Germany Martin Lorenz, Spinner GmbH, Germany Natalie Spaeth, Spinner GmbH, Germany Kai Numssen, Spinner GmbH, Germany Erwin Biebl, Fachgebiet Höchstfrequenztechnik, Technische Universität München, Germany This paper proposes periodic connections between the inner and outer conductor of a coaxial line which yields an EBG structure with well-designed bandgaps for a monomodal (Q)TEM operation in a certain frequency band. We show that for such a design the dispersions of the TEM mode and the TE11 mode are closely connected and a concerted design of TEM and TE11 dispersion is proposed. 08:40 - 09:00 - Features of layered arrays of dogbone shaped conductor pairs Invited [Show abstract] Alex Schuchinsky, Queen's University Belfast, United Kingdom Andrea Vallecchi, University of Siena, Italy Filippo Capolino, University of California, Irvine, USA Alexey Shitvov, Queen’s University Belfast, United Kingdom Finite stacks of arrays composed of the paired dogbone shaped conductors are studied. It is demonstrated that the coupling between the closely spaced array layers leads to emergence of additional transmittance resonances where the equivalent medium exhibits negative refraction. The effect of the structure geometry on the properties of equivalent medium, bandwidth and the transmission loss are discussed. 09:00 - 09:20 - Efficient design of frequency selective surfaces for the design of dichroic sub-reflectors for space applications Oral [Show abstract] Davide Ramaccia, Università Roma Tre, Italy Alessandro Toscano, Università Roma Tre, Italy Lucio Vegni, Università Roma Tre, Italy In this contribution we show how to involve frequency selective surfaces (FSS) for the design of dichroic sub-reflectors for space applications. We propose, in particular, a new configuration, to our knowledge not yet presented in the open technical literature, for the realization of low cost, lightweight FSS in presence of electromagnetic field at oblique incidence made by two thin layers with elliptical holes, properly translated and separated only by air. 09:20 - 09:40 - Split-ring-resonators inserted in a photonic crystal achieve a zerobandwidth passband Oral [Show abstract] Francisco J. Rodríguez-Fortuño, Nanophotonics Technology Center, Spain Begoña Tomás-Navarro, Nanophotonics Technology Center, Spain Carlos García-Meca, Nanophotonics Technology Center, Spain Rubén Ortuño, Nanophotonics Technology Center, Spain Alejandro Martínez, Nanophotonics Technology Center, Spain We demonstrate how the resonance of split-ring-resonators can be combined with phase interference effects in a one-dimensional photonic crystal in order to attain a zero-bandwidth electromagnetic passband within the bandgap of the crystal. Such phenomenon is a particular case of the general result in which the passband shows a forward or backward slow group velocity. Light-stopping and time-reversal capabilities are proposed for such structure. 09:40 - 10:00 - Two-dimensional quasi-crystals: Fabrication, experimental characterisation and perspectives for photonic applications Invited [Show abstract] G. Abbate, CNR-SPIN and Physics Dept., University of Naples "Federico II", Italy A. Andreone, CNR-SPIN and Physics Dept., University of Naples "Federico II", Italy S. De Nicola, CNR-ICIB "E. Caianiello", Italy E. Di Gennaro, CNR-SPIN and Physics Dept., University of Naples "Federico II", Italy V. Matarazzo, Physics Dept., University of Naples "Federico II", Italy L. Petti, CNR-ICIB "E. Caianiello", Italy P. Mormile, CNR-ICIB "E. Caianiello", Italy T. Priya Rose, Physics Dept., University of Naples "Federico II", Italy G. Zito, CNR-ICIB "E. Caianiello", Italy Two-dimensional (2D) photonic quasicrystals (PhQCs) have neither true periodicity nor translational symmetry, nevertheless they may show interesting electromagnetic properties that are not achievable by conventional periodic structures, as for instance low index-contrast band gap, quasi-isotropic behaviour, and fractal photonic bandgaps. We present different fabrication techniques for different types and length scale of 2D PhQCs, and morphological and optical haracterization of the realized samples, at different wavelengths according to their physical dimensions.
10:00 - 11:20 - Coffee break and poster session 2
10:00 - Poster session 2
1 - A new way to create microwave magnetic response of a cut wire based on interaction with surface plasmons [Show abstract] Galina Kraftmakher, Kotelnikov Institute of Radioengineering & Electronics, Russian Academy of Science, Russia Valery Butylkin, Kotelnikov Institute of Radioengineering & Electronics, Russian Academy of Science, Russia A microwave magnetic resonant response of a single nonmagnetic cut wire, or of a grating of wires, placed along the propagation direction transversely to the electric field of a plane electromagnetic wave is experimentally revealed and identified for the first time. This phenomenon is observed when cut wires are placed near a meta-surface SSP, which forms surface plasmons. A strong magnetic resonant response appears in the domain of excitation of plasmons on a low-frequency side of the plasmonic resonance and depends on the distance between a wire and SSP in the case of an asymmetrically located half-wavelength wire. 2 - Left-handed metamaterial behavior using only electric resonatorsNo show, [Show abstract] Otman El Mrabet, Faculty of Sciences, Abdelmalek Essaadi University, Morocco El Mekki Salhi , Faculty of Sciences, Abdelmalek Essaadi University, Morocco Mariem Aznabet , Faculty of Sciences, Abdelmalek Essaadi University, Morocco Mohamed Essaaidi, Faculty of Sciences, Abdelmalek Essaadi University, Morocco The electric inductive-capacitive resonator (ELC) array was proposed as an electric metamaterial which serves as an alternative to wire media. In this paper, we simulate the behaviour of ELC pairs at the microwave range. For a normal incidence illumination, we observe a broad (~1GHz) negative refractive index. This was achieved by carefully adjusting the geometrical dimensions of the ELC pairs and by mutual capacitive coupling between both ELC resonators. The negative index behavior is confirmed by two means: the dispersion diagram and the retrieval method. This design could pave the way for higher frequencies left handed metamaterials. 3 - Accurate parameter extraction of lossy composite right/left-handed (CRLH) transmission lines for planar antenna applications [Show abstract] Thorsten Liebig, University Duisburg-Essen, Germany Sebastian Held, University Duisburg-Essen, Germany Andre Rennings, University Duisburg-Essen, Germany Daniel Erni, University Duisburg-Essen, Germany We propose an accurate method to extract the equivalent circuit of the unit cell for a lossy composite right/left-handed (CRLH) transmission line. The methodology uses both, full-wave simulation (3D-FDTD) and measured scattering parameters. The benefit of such robust unit cell extraction is the possibility to optimize these important building blocks for applications such as e.g. zeroth-order resonant antennas or leaky-wave antennas. 4 - A reconfigurable fishnet metamaterial design using MEMS principle [Show abstract] Iryna Khodasevych, School of Electrical and Computer Engineering, RMIT University, Australia Wayne Rowe, School of Electrical and Computer Engineering, RMIT University, Australia Arnan Mitchell, School of Electrical and Computer Engineering, RMIT University, Australia We propose a new means for tuning fishnet metamaterials through MEMS manipulation of the unit cell geometry. Parametric investigation indicates that this approach can achieve a wider tuning range than modifying the substrate material properties. We simulate two switching states demonstrating effective operation at different frequencies in the GHz range. 5 - Experimental investigation of optical activity, Faraday rotation, circular and magnetic circular dichroism in a single-defect nonmagnetic photonic crystal [Show abstract] Viacheslav Kotov, Institute of Radio Engineering and Electronics (IRE) of Russian Academy of Sciences, Russia Mikhail Vasiliev, Electron Science Research Institute, Edith Cowan University, Australia Kamal Alameh, Electron Science Research Institute, Edith Cowan University, Australia Vladimir Burkov, Moscow Institute of Physics and Technology, Dolgoprudny, Russia Dmitriy Balabanov, Moscow Institute of Physics and Technology, Dolgoprudny, Russia Victor Koledov, Institute of Radio Engineering and Electronics (IRE) of Russian Academy of Sciences, Russia Vladimir Shavrov, Institute of Radio Engineering and Electronics (IRE) of Russian Academy of Sciences, Russia Experimental investigation results for the optical activity (OA), Faraday rotation, circular dichroism and magnetic circular dichroism of a 1-D nonmagnetic photonic crystal of structure (HL)5(LH)5 (where H/L = ZnS/SiO2 layers with λ/(4n) thicknesses) are presented. The observed OA near the defect-mode transmission line may be related to the stress-modulated individual layer properties. 6 - Design and characterization of a non-magnetic metamaterial cloakNo show, [Show abstract] Andre de Lustrac, IEF - University of Paris Sud 11, France Boubacar Kanté, Nanoscale Science and Engineering Center, USA Dylan Germain, IEF - University of Paris Sud 11, France We report here the first experimental demonstration of a non-magnetic cloak at microwave frequencies by direct mapping of the magnetic field together with the first experimental characterization of a cloak in free space con-figuration. The diameter of the concealed region is as big as 4.4 in wavelength units, the biggest reported ex-perimentally so far. 7 - Investigation of organic semiconductor poly-(3-hexylthiophene) (P3HT) designing for optically controlled phase-shifter [Show abstract] Hongyan Tang, School of Electronic Engineering, University of Electronic Science and Technology of China, China Yun Li, School of Electronic Engineering, University of Electronic Science and Technology of China, China Feifei Zhao, School of Electronic Engineering, University of Electronic Science and Technology of China, China Fuyun Zhang, School of Electronic Engineering, University of Electronic Science and Technology of China, China The organic semiconductor poly-(3-hexylthiophene) (P3HT) designing for opticallycontrolled phase-shifter has been investigated. The transmission characteristics of such design has been studied.Experimental results yield reversible differential phase shifts >10o at 2.0 GHz under tens of mW optical power illumination. These devices demonstrate great potential as linear analogue phase shifters. 8 - Super-compact stop band filter based on the grounded Hilbert patch resonator [Show abstract] Vasa Radonic, Faculty of Technical Science, Serbia Nikolina Jankovic, Faculty of Technical Science, Serbia Vesna Crnojevic-Bangin, Faculty of Technical Science, Serbia In this paper, a novel super-compact stop band filter is presented based on the grounded Hilbert patch resonator embedded in the microstrip. Characteristics of the proposed filter are compared with state-of-the-art stop band filters of similar type in terms of size, performances and fabrication complexity. The proposed fourthorder filter has overall dimensions of 0.47λg x 0.12λg, 10 dB fractional bandwidth equal to 30 % at 4.43 GHz and insertion loss of more than -30 dB in the stop band. To the best of the authors’ knowledge, the proposed filter outperforms all previously published metamaterial-based planar stop band filters. 9 - Control of coherent coupling in THz metamaterial superlattice for closed mode excitation [Show abstract] Boyoung Kang, Ewha Womans University, Korea (South) E. Choi, Ewha Womans University, Korea (South) Hyun-Hee Lee, Ewha Womans University, Korea (South) E. S. Kim, Ewha Womans University, Korea (South) J. H. Woo, Ewha Womans University, Korea (South) J. Kim, Ewha Womans University, Korea (South) Tae Y. Hong, Yonsei University, Korea (South) Jae H. Kim, Yonsei University, Korea (South) J. W. Wu, Ewha Womans University, Korea (South) A superlattice structure of planar metamaterial is designed and fabricated to control coherent coupling for a closed mode excitation. By use of a time-domain THz spectroscopy measurement, the closed mode excitation is monitored as function of polarization angle with attention to the enhancement of Q-factor. The polarization-angle selective resonance in metamaterial superlattice has a potential application in the selective field enhancement for spectroscopy. 10 - Resonant photon transport through metal-insulator-metal multilayers via coupled surface plasmons [Show abstract] Satoshi Tomita, Nara Institute of Science and Technology, Japan Maiko Yoshida, Nara Institute of Science and Technology, Japan Hisao Yanagi, Nara Institute of Science and Technology, Japan Shinji Hayashi, Kobe University, Japan Resonant photon transport through Ag-SiO2-Ag multilayers with varying SiO2 gap layer thickness has been studied. We demonstrate that the TM guided modes move continuously from the total reflecting region to the propagating region as the gap layer thickness decreases, opening the possibility of an alternative type of hyperlens. 11 - Dispersion characteristics of dual-tunable magnetic metamaterials [Show abstract] Natalia Grigoryeva, Department of Physical Electronics and Technology, St.Petersburg Electrotechnical University , Russia Boris Kalinikos, Department of Physical Electronics and Technology, St.Petersburg Electrotechnical University , Russia The investigation of electric tunability of the magnetic metamaterial dispersion characteristics is presented. Theoretical model of dual-tunable magnetic metamaterial includes the system of metal strips deposited on the surface of ferrit-ferroelectric layered structure. The considered structure exhibits the specific properties of magnetic metamaterial and performs dual tunability: magnetic and electric. 12 - Top-bottom metallic strips shorted single side paired S-ring resonatorNo show, [Show abstract] Muhammad Faisal Khan, Faculty of Electronic Engineering, Ghulam Ishaq Khan Institute of Engineering Sciences and Technology, Pakistan Muhammad Junaid Mughal, Faculty of Electronic Engineering, Ghulam Ishaq Khan Institute of Engineering Sciences and Technology, Pakistan A tunable case of Single side paired S-ring resonator (SSPSRR) i.e. Top-Bottom metallic strips shorted Single side paired S-ring resonator (TB-SSPSRR) is presented in this paper. Experimental results are included for the justification of the proposed idea. This LH material may find its applications in designing of tunable microwave devices. 13 - Investigating the optical properties of fishnet structure using an extended plane wave methodNo show, [Show abstract] Chun-Ti Lu, National Central University, Taiwan Pi-Gang Luan, National Central University, Taiwan Conventional plane wave methods (PWM) are good enough for calculating the band structures of non-dispersive periodic dielectric structures. In this paper we present an alternative formulation of PWM which can be used to calculate the band structures of some three-dimensional dispersive and anisotropic periodic structures. As specific examples, we calculate the band structures of the fishnet structure and two related sub-structures. We show that either the fishnet structure or any one of the related structures can be treated as an air-hole-array embedded in an effective anisotropic host medium because the interested wavelength of the propagating wave is much longer than the period of the dielectric-metal bi-layer in the vertical dimension. 14 - Microfluid-jet fabrication of copper-clad polyimide metamaterials at submillimeter wavelengths [Show abstract] Yew Li Hor, Institute of High Performance Computing, Singapore Zs. Szabó, Institute of High Performance Computing, Singapore J. F. Federici, Department of Physics, New Jersey Institute of Technology, USA E. P. Li, Institute of High Performance Computing, Singapore This paper presents a cost-effective technique to fabricate metamaterials using a copper-clad polyimide substrate. We deposit a liquid polyimide resist on the copper-clad film and remove the unwanted copper by etching. The structures were characterized using THz time-domain spectroscopy in transmission mode in the frequency range from 0.1 to 2 THz. 15 - Shedding new light on super-resolution imaging – a spectral domain approach [Show abstract] Ravi Hegde, Institute of High Performance Computing, Singapore Zsolt Szaboz, Institute of High Performance Computing, Singapore Yassamin Kiasat, Institute of High Performance Computing, Singapore Yew-Li Hor, Institute of High Performance Computing, Singapore Giho Park, Institute of High Performance Computing, Singapore Erping Li, Institute of High Performance Computing, Singapore Wolfgang Hoefer, Institute of High Performance Computing, Singapore We present a one-dimensional waveguide model of a superlens imaging system based on the Fourier decomposition of the source field into waveguide modes, some propagating and some evanescent. This transforms the superlens design process into a waveguide synthesis approach. It leverages a wealth of expertise available for the design of filters, artificial dielectrics and backward wave structures, and makes electromagnetic simulations much easier and more efficient. 16 - Targeted optical control of confined light inside photonic crystals [Show abstract] Hiroyuki Nihei, Health Sciences University of Hokkaido, Japan Fumiaki Matsuoka, Hokkaido University, Japan Atsushi Okamoto, Hokkaido University, Japan We demonstrate the optical control of an arbitrary single mode of light confined near a defect embedded in photonic crystals using a dark line, which is a spectrum singularity leading to the complete quenching of emis-sion. This targeted optical control can be used for information processing in nano-optical logic gates. 17 - Guiding the electromagnetic transmission by connected split ring resonators [Show abstract] Damla Ates, Bilkent University, Nanotechnology Research Center (Nanotam), Turkey A. Ozgur Cakmak, Bilkent University, Nanotechnology Research Center (Nanotam), Turkey Evim Colak, Bilkent University, Nanotechnology Research Center (Nanotam), Turkey Rongkuo Zhao, Iowa State University, Ames Laboratory, USA Costas M. Soukoulis, Iowa State University, Ames Laboratory, USA Ekmel Ozbay, Bilkent University, Nanotechnology Research Center (Nanotam), Turkey In this presentation we will present astonishingly high transmission enhancement at microwave regime by inserting connected slit ring resonators (CSRRs) in the aperture which has subwavelength sizes as λ/31xλ/12 (widthxlength). We demonstrate more than 70000 and 5000 fold enhancement experimentally. 18 - Investigation of electric and magnetic response properties of novel Δ- and Λ-type resonators at microwave frequencies [Show abstract] Cumali Sabah, Johann Wolfgang Goethe University, Physikalisches Institut, Germany Hartmut G. Roskos, Johann Wolfgang Goethe University, Physikalisches Institut, Germany In this paper, novel Δ- and Λ- type magnetic resonators for achieving negative effective permeability are investigated for the microwave frequency band. The material parameters like complex permeability and permittivity are extracted from the S-parameters. The simulated reflection and transmission characteristics show that the mentioned new resonators provide negative permeability and they can be used to realize new left-handed metamaterials which can be alternatives to the known counterparts for the microwave region. 19 - The one-dimensional photonic crystal with antiferromagnetic interlayer ordering under external DC electric field as example of nonreciprocal bi-anisotropic mediumNo show, [Show abstract] Andrii Savchenko, Dоnetsk Institute for Physics & Engineering of the National Academy of Sciences of Ukraine, Ukraine Dmitriy Kulagin, Dоnetsk Institute for Physics & Engineering of the National Academy of Sciences of Ukraine, Ukraine Sergey Tarasenko, Dоnetsk Institute for Physics & Engineering of the National Academy of Sciences of Ukraine, Ukraine Artem Tarasenko, Dоnetsk Institute for Physics & Engineering of the National Academy of Sciences of Ukraine, Ukraine Ludmila Tsymbal, Dоnetsk Institute for Physics & Engineering of the National Academy of Sciences of Ukraine, Ukraine Georgiy Levchenko, Dоnetsk Institute for Physics & Engineering of the National Academy of Sciences of Ukraine, Ukraine Vladimir Shavrov, Kotel’nikov Institute of Radio Engineering and Electronics of the Russian Academy of Sciences, Russia Vyacheslav Kotov, Kotel’nikov Institute of Radio Engineering and Electronics of the Russian Academy of Sciences, Russia The effect of an external dc electric field on the electrodynamic properties of a one-dimensional magnetic photonic crystal (MPC) with antiferromagnetic interlayer ordering is analyzed within the effective medium method. The effect of a magnetic compensation point and evanescent wave existence on the character of polariton dynamics in this type of MPCs is revealed. 20 - Tilted incidence and polarization for all-angle No show, [Show abstract] Fuli Zhang, Northwestern Polytechnical University, China Qian Zhao, Tsinghua University, China Lei Kang, Université des Sciences et technologies de Lille, France Ji Zhou, Tsinghua University, China Didier Lippens, Université des Sciences et technologies de Lille, France In this presentation, we report on the experimental verification of isotropy properties of high-permittivity meta-material composed of highly symmetric ferroelectric resonators. The isotropy was investigated via the scattering of an electromagnetic wave under tilted incidence. From both experimental and numerical data, we observed that the magnetic resonance is independent of the incidence angle for the TM and TE polarizations. However, around magnetic plasma frequency, an extra dip in the transmittance only for TE mode but not evident under normal incidence, is found 21 - Plasmonic sensor based on gold nanodisk structures for toxic organic molecules detection [Show abstract] Mariluz Martínez-Marco, Valencia Nanophotonics Technology Center, Universidad Politécnica de Valencia, Spain Pedro Rodríguez-Cantó, Valencia Nanophotonics Technology Center, Universidad Politécnica de Valencia, Spain Francisco J. Rodríguez-Fortuño, Valencia Nanophotonics Technology Center, Universidad Politécnica de Valencia, Spain Begoña Tomás-Navarro, Valencia Nanophotonics Technology Center, Universidad Politécnica de Valencia, Spain Rubén Ortuño, Valencia Nanophotonics Technology Center, Universidad Politécnica de Valencia, Spain Alejandro Martínez, Valencia Nanophotonics Technology Center, Universidad Politécnica de Valencia, Spain We report an experimental demonstration of toxic molecules detection using a plasmonic gold nanodisk based optical sensor. The functionalized gold nanostructure showed a high sensitivity to surface binding events in both gas and in aqueous solution. 22 - Electric field controlling polarization plane rotation at light reflection and light transmission through complex structure: electro-optic and magneto-optic bilayerNo show, [Show abstract] Igor Lyubchanskii, Donetsk Physical & Technical Institute of the National Academy of Sciences of Ukraine, Ukraine Yuliya Dadoenkova, Donetsk Physical & Technical Institute of the National Academy of Sciences of Ukraine, Ukraine YoungPak Lee, q-Psi and Department of Physics, Hanyang University, Korea Theo Rasing, Institute for Molecules and Materials, Radboud University Nijmegen, the Netherlands In this communication we theoretically investigate Faraday and Kerr rotation for light transmission and light reflection from an electro-optic film on a magneto-optic slab with a magnetoelectric interaction. We take into account the frequency dispersion of the permittivities and study the evolution of the Faraday and Kerr angle rotations with frequency and incidence angle. 23 - Enhancement in optical absorption by meta-structure coatingWithdrawal, [Show abstract] Liming Ji, University of Arkansas, USA Vasundara Varadan, University of Arkansas, USA In this paper, we show, through numerical simulations, the absorption enhancement of a silicon slab by coating with meta-structures such as split rings and fishnets. These coatings result in over 10x enhancement of absorption compared to that of a bare silicon slab. Compared to periodically distributed hemispherical nano-particle coatings, meta-structures can provide much greater enhancement. Moreover, a meta-structure coating is easier to tune the resonance frequency at which optimal absorption enhancement can occur. For nanoparticles, the reliance is more on scattering effects in random distributions that are more difficult to control and tune. Additionally, it is difficult to control the exact size, geometry and distribution of nanoparticles, and hence the surface of such coatings are not optimally flat that may create a challenge is using them for multijunction solar cells. Metastructures geometry can be controlled tightly and hence may be better for multi-layer integration. We propose metastructure coatings to increase the efficiency of low cost thin film solar cells. 24 - CMOS image sensors illuminated by dielectric digital planar lenses [Show abstract] Rino Marinelli, University of L'Aquila, Italy Elia Palange, University of L'Aquila, Italy We report on the design of micron-sized planar digital lenses formed by aperiodic nanometer grooves of two materials with different refractive indices, widths and constant spacing distances. We show the simulation results of the focusing intensity distribution in a real CMOS pixel equipped with a planar digital lens 25 - Towards photonic crystal acceleratorsNo show, [Show abstract] Rebecca Seviour, Lancaster University, United Kingdom Yimming Xu, Lancaster University, United Kingdom Abiola Oladipo, Lancaster University, United Kingdom We present our work towards a Photonic-Crystal particle accelerator which uses a single lattice to both create the accelerating EM field and accelerate particles. This approach removes Wakefield that limit conventional technologies. We also discuss the role of extreme disorder to exponential localization EM waves via Anderson Localization. 26 - Experimental method for the characterization of the optical properties of metamaterials in the optical spectral domain [Show abstract] Ekaterina Pshenay-Severin, Institute of Applied Physics, Friedrich-Schiller-Universität Jena, Germany Matthias Falkner, Institute of Applied Physics, Friedrich-Schiller-Universität Jena, Germany Benny Walter, Institute of Applied Physics, Friedrich-Schiller-Universität Jena, Germany Christian Helgert, Institute of Applied Physics, Friedrich-Schiller-Universität Jena, Germany Arkadi Chipouline, Institute of Applied Physics, Friedrich-Schiller-Universität Jena, Germany Andreas Tünnermann, Institute of Applied Physics, Friedrich-Schiller-Universität Jena, Germany Thomas Pertsch, Institute of Applied Physics, Friedrich-Schiller-Universität Jena, Germany In this work, we present a modification of our previously reported method allowing us to perform phase measurements on MMs in the extended wavelength range from 0.7 µm to 1.7 µm in transmission and reflection. 27 - Even magnetoresistive response in thin Nb films with washboard pinning nanostructuresNo show, [Show abstract] Oleksandr V. Dobrovolskiy, Physical Department, Karazin Kharkiv National University, Ukraine Roland Sachser, Physikalisches Institut, Goethe-Universität, Germany Michael Huth, Physikalisches Institut, Goethe-Universität, Germany Valerij A. Shklovskij, Institute for Theoretical Physics, Kharkov, Ukraine The magneto-resistive response has been studied for Nb thin films with periodic washboard pinning nanostructures prepared by focused ion beam (FIB) milling. We show that such films exhibit guided vortex motion under perpendicular magnetic field orientation with regard to the film plane and provide a perspective for being used in fluxonic applications. 28 - Low limit for the permittivity of Mie-based resonators in homogeneous metamaterials [Show abstract] Mikhail Odit, St.Petersburg Electrotechnical University LETI, Russia Irina Vendik, St.Petersburg Electrotechnical University LETI, Russia Bi-spherical isotropic metamaterial consisting of two types of spherical resonators of different sizes is con-sidered. It is shown that to get double negative behavior of this metamaterial the resonators with permittivity higher than 100 may be used. In homogeneous metamaterial describing by effective parameters, Mie-resonance dielectric resonators have lower limit of permittivity. 29 - Solitary waves in negative index metamaterials [Show abstract] Amarendra Kumar Sarma, Department of Physics,Indian Institute of Technology Guwahati, India We present a solitary wave solution of the generalized nonlinear Schrodinger equation in the context of a negative index material by using a scaling transformation and coupled amplitude-phase formulation. We have shown that soliton shift in a negative index material may be suppressed by a judicious choice of the third order dispersion and self-steepening parameter. 30 - Microwave stereometamaterials and parameter extraction [Show abstract] Vojislav Milosevic, Institute of Physics, Belgrade, Serbia Branka Jokanovic, Institute of Physics, Belgrade, Serbia Branko Kolundzija, Faculty of Electrical Engineering, University of Belgrade, Serbia We study properties of meta-line consisting of microstrip line loaded with via and coupled with two-layer split-ring resonators. Various configurations obtained by rotating rings in resonators are analyzed, and it is shown that both s-parameters and effective electromagnetic parameters change considerably, thus offering a significant degree of freedom in circuit design. 31 - Terahertz near-field of complementary metamaterials [Show abstract] Alex Ortner, Department of Molecular and Optical Physics, Albert-Ludwigs-University Freiburg, Germany Andreas Bitzer, Institute of Applied Physics, University of Bern, Switzerland Markus Walther, Freiburger Materials Research Center, University of Freiburg, Germany In this presentation we report Terahertz (THz) near-field measurements of complementary split ring resonators. The measured electric near-field is compared with the magnetic near-field of a conventional split ring resonator. Our results are in agreement with proposed theories and recent simulations and confirm the predictions of Babinet’s principle. 32 - Second harmonic generation and spatial solitons in nonlinear Left-Handed Metamaterials [Show abstract] Hamed Shoorian, K. N. Toosi University of Technology, Iran Mohammad Sadegh Abrishamian, K. N. Toosi University of Technology, Iran Exact equations for second harmonic generation in a left-handed metamaterial (LHM) with cubic nonlinear response in the general case of phase mismatching are presented.It is demonstrated that special case of perfect phase matching condition lead to a spatial soliton solution. 33 - Tunnelling, impedance matching and power transmission enhancement trough electrically small apertures via omega inclusions [Show abstract] Luca Scorrano, University Roma Tre, Applied Electromagnetics Laboratory , Italy Filiberto Bilotti, University Roma Tre, Applied Electromagnetics Laboratory , Italy Ekmel Ozbay, Bilkent University, Nanotechnology Research Center, Turkey Lucio Vegni, University Roma Tre, Applied Electromagnetics Laboratory , Italy In this contribution, we discuss the role of omega inclusions in increasing the power transmission through sub-wavelength apertures in metallic screens. The strong resonance excited allows a complete transfer of the impinging power if the screen, where the hole is placed, is inside a bounded structure such as a waveguide. The power transfer is not affected by the surrounding environment (i.e. input and the output waveguides) but only by the omega particle design. The details of the setup as well as the design parameters are given and the performance of the proposed structures is illustrated and tested through the use of full-wave simulations. 34 - Terahertz response of a metamaterial consisting of 3-D microcoils [Show abstract] Stefan Waselikowski, Freiburg Materials Research Center, University of Freiburg, Germany K. Kratt, Laboratory for Microactuators, Department of Microsystems Engineering, University of Freiburg, Germany M. Walther, Freiburg Materials Research Center, University of Freiburg, Germany In this paper we use terahertz time-domain spectroscopy and numerical simulations to investigate the re- sponse of a metamaterial consisting of 3-D micro coils fabricated by an automated wire bonding technique. The coils are wound on dielectric cylinders of 200 μm diameter and the wire ends have been contacted to planar metal pads. Periodic arrays of the coils exhibit characteristic resonances in their far-field transmission spectrum. 35 - The formation of nanoclusters and periodic structures at the surface of the silicates by resonant CO2 laser irradiation [Show abstract] Anel Mukhamedgalieva, Moscow State Mining University, Russia Anatolii Bondar, Moscow State Mining University, Russia Vladimir Laptev, Institute of Spectroscopy of Russian Academy of Sciences, Russia Igor Shvedov, Moscow State Mining University, Russia The pulsed CO2 laser irradiation (107 W/cm2, 200ns) of silicates (quartz-SiO2, nepheline - Na[AlSiO4], rodonite - CaMn4[Si5O15], zircon - ZrSiO4 etc.) lead as to creation of the periodic structures as to the creation of metallic and silicon nanoclusters at the irradiated surface. 36 - Squeezing electromagnetic energy and enhancing magnetic field with a permeability-near-zero metamaterialNo show, [Show abstract] Yi Jin, Zhejiang University, Hangzhou, China, China Sailing He, Zhejiang University, Hangzhou, China, China Nearly no energy stream can enter a simply-connected conventional dielectric material positioned inside a permeability-near-zero material. When the dielectric domain is shaped as a split ring with a gap opened surrounding a source, the electromagnetic energy generated by the source is forced to propagate through the gap. When the gap is narrow, the energy stream density becomes very large and makes the magnetic field enhanced drastically in the gap. 37 - Modeling of copper powder microwave heating with varying particle size [Show abstract] Anton Anzulevich, Condensed Matter Physics Department, Chelyabinsk State University, Russia Vasiliy Buchelnikov, Condensed Matter Physics Department, Chelyabinsk State University, Russia Igor Bychkov, Condensed Matter Physics Department, Chelyabinsk State University, Russia This work is a theoretical verification of one of the last experimental results where microwave heating curves of copper powder with varying particle size and porosity were obtained. Approximate theoretical model for calculation of microwave heating of copper powder is suggested in this work. Theoretical heating curves of copper powder are obtained in the present study. And they qualitatively correspond to the ones from experiment. 38 - New asymmetric left-handed couplers for microwave applications [Show abstract] Iulia Andreea Mocanu, University Politehnica of Bucharest, Faculty of Electronics, Communications and Information Technology, Romania A. Ochetan, University Politehnica of Bucharest, Faculty of Electronics, Communications and Information Technology, Romania Marian Gabriel Banciu, National Institute of Materials Physics, Romania A. Ioachim, National Institute of Materials Physics, Romania N. Militaru, University Politehnica of Bucharest, Faculty of Electronics, Communications and Information Technology, Romania G. Lojewski, University Politehnica of Bucharest, Faculty of Electronics, Communications and Information Technology, Romania Investigations on new asymmetric CRLH couplers for microwave applications are presented in this paper. The proposed 0 dB backward couplers exhibit better frequency response than the conventional asymmetric CRLH coupler in a broad dual frequency band. 39 - Spectra peculiarities of bi-periodical magnetophotonic crystal in microwave band [Show abstract] Ganna Kharchenko, Usikov Institute of Radio Physics and Electronics of National Academy of Science, Ukraine Mikhail Khodzitsky, Usikov Institute of Radio Physics and Electronics of National Academy of Science, Ukraine Pavlo Kharchenko, Usikov Institute of Radio Physics and Electronics of National Academy of Science, Ukraine We study the spectra peculiarities of bi-periodical magnetophotonic crystal (BP-MPC) both experimentally and theoretically. BP-MPC elementary cell was formed by dielectric photonic crystal and ferrite layer. The split-ting of dielectric PC band gap and appearance of new pass bands has been analyzed. The influence of magnetic defect layer thickness on pass bands number has been shown. The tuning of pass bands position by external magnetic field has been demonstrated. 40 - Thin-film sensing using metamaterialsNo show, [Show abstract] Mondher Labidi, Research Unit Systems of Telecommunications (6’Tel), SUP’COM, Tunisia, Tunisia Jamel Belhadj Tahar, Research Unit Systems of Telecommunications (6’Tel), SUP’COM, Tunisia, Tunisia Fethi Choubani, Research Unit Systems of Telecommunications (6’Tel), SUP’COM, Tunisia, Tunisia This paper is devoted to study one of the most important applications of metamaterials which is thin-film sensing. We provide a broad overview of thin film deposition methods, depositing the substance material in the gap, under the rings or on the rings. Split rings accommodate a wide range of individual preferences and sensing abilities. We demonstrate sensing features of rectangular split rings designed to resonate in the frequency range of 8-12 GHz 41 - A combinatorial approach to metamaterials discovery [Show abstract] Eric Plum, University of Southampton, United Kingdom Kenji Tanaka, University of Southampton, United Kingdom Wei Ting Chen, National Taiwan University, Taiwan Vassili Fedotov, University of Southampton, United Kingdom Din Ping Tsai, National Taiwan University, Taiwan Nikolay I. Zheludev, University of Southampton, United Kingdom Some fifteen years ago a paper reporting a combinatorial approach to materials discoveries revolutionized materials research and other disciplines such as chemistry and pharmacology. Here we report on how a combinatorial approach combined with advanced nanofabrication helps to discover photonic metamaterials optimized for prescribed functionalities. 42 - Narrow bandpass filter incorporating bandwidth modifying slots in proximity to metamaterial resonators [Show abstract] Ibraheem Al-Naib, Philipps-Universität Marburg, Germany Christian Jansen, Philipps-Universität Marburg, Germany Martin Koch, Philipps-Universität Marburg, Germany In this paper we demonstrate metamaterial-based coplanar waveguide bandpass filters with slots inserted in direct proximity to split ring resonators. The slots enable a full control of the bandwidth by varying their lengths. The proposed structures feature a narrow bandwidth, high stopband suppression and a small electrical size. 43 - Application of TLM method based on Z-Transforms to metamaterial modelling [Show abstract] Nebojsa Doncov, University of Nis, Serbia Bratislav Milovanovic, University of Nis, Serbia Tatjana Asenov, University of Nis, Serbia TLM method based on Z-transforms is used to develop a numerical model of electromagnetic LH MTM. Such enhanced TLM method is extended in this paper to capture frequency dispersive behaviour of LH MTM described by Drude model. The examples chosen to illustrate some of LH MTM unique characteristics as well as application to MTM with a graded refractive index profile verify the model accuracy. 44 - Cloaking a 3-d arbitrary shaped star-domain [Show abstract] Alessandro Veltri, CNRS - Centre de Recherche Paul Pascal, France In this presentation we will describe a straightforward method to design the electromagnetic cloak of a 3d-generic star domain whose surface is defined just by a set of points distributed over it. 45 - The behavior of light bullets in the array of a carbon nanotubes adsorbed by the hydrogenNo show, [Show abstract] Alexander Popov, Volgograd State University, Russia Nikolay Lebedev, Volgograd State University, Russia Mikhail Belonenko, Volgograd Institute of Business, Russia We received the dispersion law for electrons by Green's function method based on the Anderson periodic model under the assumption that carbon nanotubes adsorbed by hydrogen. We consider the joint dynamics of electrons and electromagnetic fields in low-temperature limit, and we obtain an effective equation, which describes the propagation of extremely short optical pulses and light scratches. We adduce the solutions of these equations for two-dimensional system of CNTs depending on the parameters of the problem. 46 - Reduction of the absorption loss in the head by loading of PIFA with metamaterial and high permittivity structures [Show abstract] Ivan Bonev, Department of Electronic Systems, Aalborg University, Denmark In this paper, we propose a Thin Wires (TW) structure with a combination of High Permittivity layer (TWHP) to be used to load a Planar Inverted F Antenna (PIFA) in order to reduce the power radiated toward the head. In our numerical simulations, we have used CAD hand models generated with the help of the results ob-tained via a recent grip study. As an antenna, we have modelled a dual band PIFA covering 900 and 1800 MHz bands. The numerical computations have been performed through the in-house Finite Difference Time Domain (FDTD) parallel code. At both low (900 MHz) and high (1800 MHz) bands, a significant reduction in the ab-sorption loss in head has been observed due to the special loading of the PIFA. At low band, for soft grip style, for the proposed antenna structure with top location of the antenna, the absorption loss in the head has been re-duced by 0.41 dB compared to the case of the antenna itself. Moreover, at the high band, bottom positioned an-tenna and soft grip style, the decrease in the absorption loss in the head is 0.44 dB. 47 - Application of multipole model for analytical description of disorder in metamaterials [Show abstract] Arkadi Chipouline, Institute of Applied Physics, Friedrich Schiller University Jena, Germany S. Sugavanam, Institute of Applied Physics, Friedrich Schiller University Jena, Germany C. Helgert, Institute of Applied Physics, Friedrich Schiller University Jena, Germany J. Petschulat, Institute of Applied Physics, Friedrich Schiller University Jena, Germany T. Pertsch, Institute of Applied Physics, Friedrich Schiller University Jena, Germany Metamaterials consisting of randomly positioned nano resonators are considered. A developed model based on an analytical multipole approach for metamaterials [8] has been extended to disordered arrangements, taking into account dipole-dipole interactions between adjacent nano resonators. Final results show good qualitative agreement with the experimental data.
11:20 - 13:00 - Parallel sessions Wednesday 2
11:20 - Special session 3 Dispersion Engineering in Microwave Circuits [Show abstract]
In this Special Session, the recent progress in dispersion engineering based on transmission line metamaterials, or related structures (i.e., tailoring the dispersion diagram of artificial transmission lines),will be reviewed by some of the pioneering groups working on this topic. Several microwave applications, including both passive and active circuits and antennas, will be highlighted, and several examples provided, with emphasis on the advantages as compared to state-of-the-art components.
Organizer(s): Ferran Martin, GEMMA/CIMITEC, Departament d'Engineyria Electrònica, Spain
Session chairperson(s): Ferran Martin, GEMMA/CIMITEC, Departament d'Engineyria Electrònica, Spain
11:20 - 11:40 - Broadband directional couplers and power dividers based on metamaterial transmission lines Invited [Show abstract] Dmitry Kholodnyak, St. Petersburg Electrotechnical University, Russia Irina Munina, St. Petersburg Electrotechnical University, Russia Polina Kapitanova, St. Petersburg Electrotechnical University, Russia Viacheslav Turgaliev, St. Petersburg Electrotechnical University, Russia Aleksander Rusakov, St. Petersburg Electrotechnical University, Russia Pavel Turalchuk, St. Petersburg Electrotechnical University, Russia Irina Vendik, St. Petersburg Electrotechnical University, Russia Dirk Stöpel, Ilmenau University of Technology, Germany Stefan Humbla, Ilmenau University of Technology, Germany Jens Müller, Ilmenau University of Technology, Germany Matthias A. Hein, Ilmenau University of Technology, Germany Different approaches to design of broadband directional couplers and power dividers based on artificial metamaterial transmission lines are considered. Design and results of experimental investigation of a broadband rat-race ring are presented. A concept of a broadband reconfigurable Wilkinson-type power divider is proposed. Using artificial right- and left-handed transmission lines with negative reactances to enhance the operational bandwidth of a branch-line directional coupler is discussed. 11:40 - 12:00 - Design of passive microwave components by using dispersion engineering method Invited [Show abstract] Tao Yang, University of California, Los Angeles, Anguilla Tatsuo Itoh, Department of Electronic Engineering, University of California, USA In the presentation, a general design method of dispersion engineering is proposed. Typical passive mi-crowave components including the single band mushroom bandpass filter and dual-band bandpass filter which are designed based on the dispersion engineering are given as examples to illustrate the general method. The given examples show that the dispersion engineering method has the advantages of accuracy and directness as compared to the conventional design method 12:00 - 12:20 - Multiband components based on metamaterial concepts Invited [Show abstract] Ferran Martin, Departament d'Engineyria Electrònica, UAB, Spain Miguel Duran-Sindreu, Departament d'Engineyria Electrònica, UAB, Spain Gerard Sisó, Departament d'Engineyria Electrònica, UAB, Spain Jordi Bonache, Departament d'Engineyria Electrònica, UAB, Spain In this paper, two metamaterial-based approaches for the implementation of multiband components in pla-nar technology are highlighted. One of these approaches is based on the hybrid model of metamaterial transmis-sion lines, which makes use of complementary split ring resonators (CSRRs), shunt stubs and series gaps in a microstrip configuration, and is useful for the implementation of tri-band components under certain conditions. The other is based on the generalized model of composite right/left handed (CRLH) transmission lines, and opens the way to the implementation of quad-band components. Illustrative examples of both approaches are provided 12:20 - 12:40 - Monolithic dual-band/diplexer distributed amplifier Invited [Show abstract] Diego Palombini, Università di Roma Tor Vergata, Italy Javier Mata-Contreras, Universidad de Málaga, Spain Teresa María Martín-Guerrero, Universidad de Málaga, Spain Ernesto Limiti, Università di Roma Tor Vergata, Italy Carlos Camacho-Peñalosa, Universidad de Málaga, Spain Dual-band/diplexer distributed amplifiers are innovative amplifiers that have been inspired by meta-material concepts. In this contribution, the viability and limitations of such distributed amplifiers have been addressed through the full design and simulation of an X-band prototype. 12:40 - 13:00 - A design procedure for generalized negative-refractive-index transmission-lines in dual/quad-band applications Invited [Show abstract] Loïc Markley, University of Toronto, Canada George V. Eleftheriades, University of Toronto, Canada A design procedure is presented for synthesizing generalized negative-refractive-index transmission lines for dual and quad band applications. These metamaterial lines exhibit two pairs of backward and forward wave bands with no stop band between each pair. Analytic expressions determine the values of the lumped element loads given a desired Bloch phase and Bloch impedance at four arbitrary operating frequencies. The procedure is well applied to the design of passive quad-band microwave components and dual-band structures such as periodic leaky wave antennas.
11:20 - Session 3a Micro- and Nanofabrication 1
Session chairperson(s): Dorota A. Pawlak, Institute of Electronic Materials Technology, Poland
11:20 - 11:40 - Direct laser writing by two-photon polymerization Invited [Show abstract] Maria Farsari, Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology Hellas (FORTH), Greece We present our investigations on the fabrication of three-dimensional nanostructures by direct laser writing using organic-inorganic hybrid materials that (i) can be structured without shrinkage, (ii) have nonlinear optical properties, and (iii) can be selectively covered with metal. 11:40 - 12:00 - 3D optical Yagi-Uda nanoantenna array Oral [Show abstract] Daniel Dregely, University of Stuttgart, Germany We fabricated three-dimensional arrays of optical Yagi-Uda nano-antennas and compare the measurements with theoretical simulations. Due to the high directivity of the array structure the incoming light is received efficiently at the resonant wavelength in the near-infrared (around λ = 1.3 μm) and is confined at the tips of the feed elements. 12:00 - 12:20 - Optical tweezing double negative spherical particles by arbitrary laser beams in generalized Lorenz-Mie theory Oral [Show abstract] Leonardo Ambrosio, University of Campinas, Brazil Hugo Hernández-Figueroa, University of Campinas, Brazil The fundamental differences between gradient forces over double-positive (DPS) and double-negative (DNG) particles in optical trapping are outlined, using the generalized Lorenz-Mie theory (GLMT) and the integral localized approximation. For the first time in the literature, we analyze how a DNG particle behaves under the influence of a Bessel beam. 12:20 - 12:40 - Stacked fishnet and Swiss cross samples fabricated by NIL Oral [Show abstract] Iris Bergmair, Functional Surfaces and Nanostructures, Profactor GmbH, Austria Ahmad Saeed, Center for Surface and Nanoanalytics, Johannes Kepler Unversity Linz, Austria Babak Dastmalchi, Center for Surface and Nanoanalytics, Johannes Kepler Unversity Linz, Austria Günter Hesser, Center for Surface and Nanoanalytics, Johannes Kepler Unversity Linz, Austria Wolfgang Hilber, Institute of Microelectronics and Microsensors, Johannes Kepler University Linz, Austria Thomas Pertsch, Institute for Applied Physics, Friedrich-Schiller-Universität Jena, Germany Holger Schmidt, Institute for Applied Physics, Friedrich-Schiller-Universität Jena, Germany Ernst-Bernhard Kley, Institute for Applied Physics, Friedrich-Schiller-Universität Jena, Germany Uwe Hübner, Institute of Photonic Technology, Friedrich-Schiller-University, Jena, Germany Raluca Penciu, Institute of Electronic Structure & Laser, Foundation for Research & Technology, Greece Maria Kafesaki, Institute of Electronic Structure & Laser, Foundation for Research & Technology, Greece Costas M. Soukoulis, Institute of Electronic Structure & Laser, Foundation for Research & Technology, Greece Kurt Hingerl, Center for Surface and Nanoanalytics, Johannes Kepler Unversity Linz, Austria Michael Mühlberger, Functional Surfaces and Nanostructures, Profactor GmbH, Austria Rainer Schöftner, Functional Surfaces and Nanostructures, Profactor GmbH, Austria In this paper we present a new method for the fabrication of stacked Negative Index Material structures using Nanoimprint Lithography (NIL). First single layers are fabricated with NIL on Silicon substrates and afterwards the single layers are peeled off by using a UV-curable hybrid polymer as “glue”. Repeating this process one obtain stacked NIMs in a fast and easy way. 12:40 - 13:00 - Planar Infrared zero index metamaterials Oral [Show abstract] Theresa Mayer, Penn State University, USA Seokho Yun, Penn State University, USA Jeremy Bossard, Penn State University, USA Yan Tang, Penn State University, USA Douglas Werner, Penn State University, USA In this paper, we report a planar Zero Index Metamaterial operating in the far-infrared. The structure, consisting of a Ag screen surrounded by a polyimide substrate and superstrate, was optimized using a genetic algorithm to have a low/zero refractive index with maximum transmission. The measured properties of the fabricated sample show the excellent agreement with the simulations, achieving Re[neff] ≈ 0.41 and |T|2 ≈ -1.4 dB at 18.3 m.
11:20 - Session 3b Superlenses and Hyperlenses 1
Session chairperson(s): Nicholas X. Fang, University of Illinois at Urbana-Champaign, USA
11:20 - 11:40 - Looking beyond the Perfect Lens Oral [Show abstract] Wei Hsiung Wee, Imperial College London, United Kingdom John Pendry, Imperial College London, United Kingdom From the conservation of energy, we can easily see that in order to see through a lossy material would require lenses with gain. The intent of this paper therefore, is to propose a simple scheme by which we can construct a general Perfect Lens, with gain 11:40 - 12:00 - Resonant metalens to brak the diffraction barrier Oral [Show abstract] Fabrice Lemoult, Institut Langevin - CNRS & ESPCI ParisTech, France Geoffroy Lerosey, Institut Langevin - CNRS & ESPCI ParisTech, France Mathias Fink, Institut Langevin - CNRS & ESPCI ParisTech, France We describe the concept of resonant metalens, a cluster of coupled subwavelength resonators, here an array of resonant wires. Dispersion allows the conversion of subwavelength wavefields into temporal signatures, and the Purcell effect permits an efficient radiation. We experimentally demonstrate imaging and focusing from the far-field with resolutions far below the diffraction limit. 12:00 - 12:20 - Perfect imaging with positive refraction Invited [Show abstract] Ulf Leonhardt, University of St Andrews, United Kingdom Perfect imaging has been believed to rely on negative refraction [1], but in the lecture I show that an ordinary positively-refracting optical medium may form perfect images as well. In particular, I prove that Maxwell's fish eye [2] in two-dimensional integrated optics makes a perfect instrument with a resolution not limited by the wavelength of light [3,4]. I also show how to modify the fish eye such that perfect imaging devices can be made in practice [3,4]. 12:20 - 12:40 - Oxide-based superlenses in the infrared regime Oral [Show abstract] Susanne Kehr, University of St Andrews, United Kingdom Yongmin Liu, University of California Berkeley, USA Pu Yu, University of California Berkeley, USA Lane Martin, University of Illinois, Urbana-Champaign, USA Manfred Helm, Forschungszentrum Dresden-Rossendorf, Germany Xiang Zhang, University of California Berkeley, USA Lukas Eng, Technische Universität Dresden, Germany Ramamoorthy Ramesh, University of California Berkeley, USA Planar layers of perovskite oxides show superlensing in the infrared regime around 15 μm. We study the spectral response of such lenses as well as the lateral and vertical distribution of the evanes- cent fields in their image planes by means of scattering scanning near-field infrared microscopy. 12:40 - 13:00 - Experimental mapping of hyperbolic wave vector surfaces in silver nanowire arrays Oral [Show abstract] Jyotirmayee Kanungo, Queen's University Belfast, United Kingdom Jörg Schilling, Martin-Luther-Universitaet Halle-Wittenberg, Germany The two principal effective dielectric constants of silver nanowire arrays are directly derived from the an-gular dependence of the Fabry-Perot peaks in transmission measurements. Furthermore, the hyperbolic wave vector surface is mapped from these experimental data.
14:30 - 16:10 - Parallel sessions Wednesday 3
14:30 - Special session 8 Slow Waves and Coupling Mechanisms in Metamaterials [Show abstract]
Properties of metamaterials assembled from individual resonators are governed by strong interactions between individual ‘artificial atoms’. The coupling between individual resonators may lead to propagation of slow waves with the wavelength much shorter than that of the electromagnetic radiation. Due to these slow waves metamaterials may provide the basis for a variety of near-field manipulating devices including miniaturized waveguide components and near field lenses. This session discusses recent advances in studies of coupling mechanisms in metamaterials, properties of slow waves of coupling and in the developments of novel applications.
Organizer(s): Ekaterina Shamonina, University of Erlangen-Nuremberg, Erlangen Graduate School in Advanced Optical Technologies (SAOT), Germany, Anna Radkovskaya, Lomonosov Moscow State University, Russia
Session chairperson(s): Ekaterina Shamonina, University of Erlangen-Nuremberg, Erlangen Graduate School in Advanced Optical Technologies (SAOT), Germany, Anna Radkovskaya, Lomonosov Moscow State University, Russia
14:30 - 15:10 - Slow waves on coupled metamaterial elements Keynote [Show abstract] Laszlo Solymar, EEE Dept Imperial College London, United Kingdom A brief review of waves propagating on 1D, 2D and 3D arrays of coupled elements. 15:10 - 15:30 - Coupling and nonlinear effects in metamaterial unit-cells Invited [Show abstract] Thomas Zentgraf, University of California at Berkeley, USA Kevin O’Brien, University of California at Berkeley, USA Shuang Zhang, University of California at Berkeley, USA Yong-Shik Park, University of California at Berkeley, USA Xiang Zhang, University of California at Berkeley, USA Metamaterials with unit-cells consisting of coupled radiative bright and non-radiative dark plasmonic ele-ments have been shown to exhibit optical interference effects leading to pheonomena similar to atomic electro-magnetic induced transparency (EIT). In this presentation we will discuss the nonlinear phenomena in pi - shaped EIT metamaterials, in particular their correlation to the effect of symmetry breaking and field enhancement. 15:30 - 15:50 - Coupling transducers for magneto-inductive waveguides Invited [Show abstract] Richard Syms, Imperial College London, United Kingdom Laszlo Solymar, Imperial College London, United Kingdom A new design of resonant coupling transducer that can connect a magneto-inductive waveguide to real impedance is demonstrated. The transducer can provide exact matching at two separate frequencies and approximate matching between, allowing low reflectivity over a broad band. The theory is confirmed using thin-film magneto-inductive cable. 15:50 - 16:10 - Electromagnetic interaction of split-ring resonators: The role of separation and relative orientation Invited [Show abstract] Stefan Linden, Universität Bonn, Germany Nils Feth, Karlsruhe Institute of Technology (KIT), Geramny Manuel Decker, Karlsruhe Institute of Technology (KIT), Germany Michael König, Karlsruhe Institute of Technology (KIT), Germany Jens Niegemann, Karlsruhe Institute of Technology (KIT), Germany Kurt Busch, Karlsruhe Institute of Technology (KIT), Germany Martin Wegener, Karlsruhe Institute of Technology (KIT), Germany In this presentation, we will discuss electromagnetic coupling effects in SRR dimers and low-symmetry SRR arrays. For the SRR dimers, the resonance frequency of the coupled mode as well as its extinction cross-section and its quality factor depend on the relative orientation and separation of the two split-ring resonators. In the case of low-symmetry SRR arrays, electromagnetic interaction leads to a polarization behavior of an effective wave plate.
14:30 - Session 8a Micro- and Nanofabrication 2
Session chairperson(s): Maria Farsari, IESL-FORTH, Greece
14:30 - 14:50 - Transition from 2D to 3D effective optical properties in gold nanoparticle-polymer composite films Oral [Show abstract] Julien Vieaud, CNRS and University of Bordeaux, France Hassan Saadaoui, CNRS and University of Bordeaux, France Marc Warenghem, CNRS and Universite d’Artois, France Ashod Aradian, CNRS and University of Bordeaux, France Virginie Ponsinet, CNRS and University of Bordeaux, France We study the optical properties of composite films made of spherical gold nanoparticles immersed into a polymer host matrix. We probe the transition in the effective optical properties between thin (2D-like) and thick (3D-like) response and confront our measurements with effective medium models. 14:50 - 15:10 - Low-loss two-functional-layer negative-index metamaterial operating in the visible spectrum utilising 2nd order magnetic resonance Oral [Show abstract] Carlos Garcia-Meca, Nanophotonics Technology Center (Universidad Politecnica de Valencia), Spain J. Hurtado, Nanophotonics Technology Center (Universidad Politecnica de Valencia), Spain W. Dickson, Centre for Nanostructured Media. The Queen's University of Belfast, United Kingdom A. V. Zayats, Centre for Nanostructured Media. The Queen's University of Belfast, United Kingdom A. Martínez, Nanophotonics Technology Center (Universidad Politecnica de Valencia), Spain We report the fabrication and characterisation of a metamaterial exhibiting negative index of refraction at visible wavelengths while presenting low losses. To this end, we exploit a second-order magnetic resonance of the so-called fishnet structure. A high figure of merit around 2.5 is achieved in the negative index band (centred at 750 nm) thanks to simultaneous negative permittivity and permeability. 15:10 - 15:30 - Nano- and micro-structured metamaterial composites: the directional solidification approach Invited [Show abstract] D. A. Pawlak, Institute of Electronic Materials Technology (ITME), Poland M. Gajc, Institute of Electronic Materials Technology (ITME), Poland A. Klos, Institute of Electronic Materials Technology (ITME), Poland K. Kolodziejak, Institute of Electronic Materials Technology (ITME), Poland K. Sadecka, Institute of Electronic Materials Technology (ITME), Poland S. Turczynski, Institute of Electronic Materials Technology (ITME), Poland A. Nikolaenko, Optoelectronics Research Centre & Centre for Nanostructured Photonic Metamaterials, United Kingdom N. Zheludev, Optoelectronics Research Centre & Centre for Nanostructured Photonic Metamaterials, United Kingdom We report on a new paradigm for fabricating nano and micro-structured metamaterials by self-organization through directional solidification of eutectics and dielectrics doped with metallic nanoparticles. 15:30 - 15:50 - Bottom-up fabrication and optical properties of tunable layered arrays of gold nanoparticles Oral [Show abstract] Alastair Cunningham, University of Heidelberg, Germany Thomas Bürgi, University of Heidelberg, Germany The fabrication of large scale layered arrays of gold nanoparticles is discussed. The system developed offers control over important material parameters and allows the build-up of 3D structures giving rise to bulk optical materials. The optical properties have been investigated showing that the coupling of plasmon resonances can be tuned. 15:50 - 16:10 - Fabrication of 3-D cubic unit cell metamaterials with measured IR resonances Oral [Show abstract] Bruce Burckel, Sandia National Laboratories, USA Joel Wendt, Sandia National Laboratories, USA Greg Ten Eyck, Sandia National Laboratories, USA Robert Ellis, Sandia National Laboratories, USA James Ginn, Sandia National Laboratories, USA Igal Brener, Sandia National Laboratories, USA Michael Sinclair, Sandia National Laboratories, USA 3-D cubic unit cell arrays containing split ring resonators were fabricated and characterized. The unit cells are ~ 3 orders-of-magnitude smaller than microwave SRR-based metamaterials and exhibit both electrically and magnetically excited resonances for normally incident TEM waves in addition to showing improved isotropic response.
14:30 - Session 8b Millimer-Wave and THz Metamaterials 2
Session chairperson(s): Alex Schuchinsky, Queen's University Belfast, United Kingdom
14:30 - 14:50 - Extraordinary transmission metamaterials: From millimetre-waves to terahertz Invited [Show abstract] Mario Sorolla, Millimeter and Terahertz Waves Laboratory, Universidad Pública de Navarra, Spain Miguel Beruete, Millimeter and Terahertz Waves Laboratory, Universidad Pública de Navarra, Spain Miguel Navarro-Cia, Millimeter and Terahertz Waves Laboratory, Universidad Pública de Navarra, Spain Francisco Falcone, Millimeter and Terahertz Waves Laboratory, Universidad Pública de Navarra, Spain Igor Campillo, CIC nanoGUNE Consolider, Spain Sergei Kuznetsov, Novosibirsk State University, Russia In this presentation, a thorough list of devices based on extraordinary transmission and metamaterials will be presented. Design as well as measurement procedures will be presented, both in millimetre-waves and tera-hertz. The range of potential applications is wide: negative refracting prisms, metamaterial lenses, spatial filter-ing structures, polarisation devices, etc. 14:50 - 15:10 - Radiative coupling in metamaterial arrays Oral [Show abstract] Jan Wallauer, Freiburger Materials Research Center, University of Freiburg, Germany Andreas Bitzer, Institute of Applied Physics, University of Bern, Switzerland Markus Walther, Freiburger Materials Research Center, University of Freiburg, Germany We show that a resonant response with very high quality factors can be achieved in periodic metamaterials by radiatively coupling their structural elements. The coupling is mediated by lattice modes and can be efficiently controlled by tuning the lattice periodicity. In the strong coupling regimes we identify avoided crossings between the plasmonic eigenmodes and the diffractive lattice modes. 15:10 - 15:30 - Gradient Index Metamaterial Based on Slot Elements Oral [Show abstract] Oliver Paul, University of Kaiserslautern, Germany Benjamin Reinhard, University of Kaiserslautern, Germany Bernd Krolla , University of Kaiserslautern, Germany René Beigang , University of Kaiserslautern, Germany Marco Rahm Rahm, University of Kaiserslautern, Germany We present a gradient-index (GRIN) metamaterial based on an array of annular slots. The structure allows a large variation of the effective refractive index under normal-to-plane incidence and thus enables the construction of GRIN devices consisting of only a small number of functional layers. Using full-wave simulations, we demonstrate the annular slot concept by means of a 3-unit-cell thin GRIN lens for the terahertz (THz) range. We achieved an index contrast of $Delta n = 1.5$ resulting in a highly refractive lens suitable for focusing THz radiation to a spot size smaller than the wavelength. 15:30 - 15:50 - Polarization-independent split-ring resonator arrays with colossal optical activity Oral [Show abstract] Sebastian Engelbrecht, Universität Würzburg, Germany Max Wunderlich, Universität Würzburg, Germany Alexey Shuvaev, Universität Würzburg, Germany Andrei Pimenov, Universität Würzburg, Germany We have studied the optical activity of bi-layered split-ring resonator arrays, which form chiral quasi-molecules. Our investigation shows that such systems can produce a colossal optical activity of up to 600° per wavenumber. We present a way to effectively suppress the polarization dependence of the optical activity by introducing higher symmetries in the structures. 15:50 - 16:10 - 3D metamaterials with a pure magnetic resonance at terahertz frequencies Invited [Show abstract] Richard Averitt, Boston University, Department of Physics, USA Andrew Strikwerda, Boston University, Department of Physics, USA Kebin Fan, Boston University, Department of Mechanical Engineering, USA Hu Tao, Boston University, Department of Mechanical Engineering, USA Willie Padilla, Boston College, Department of Physics, USA Xin Zhang, Boston University, Department of Mechanical Engineering, USA We present a 3-dimensional (3D) stand-up metamaterial which displays a purely magnetic resonance at terahertz (THz) frequencies. A multilayer-electroplating technique is used to fabricate these structures and both experimental and simulated results demonstrate a strong magnetic resonance. The successful design, fabrication and characterization of these 3D structures provides a new pathway for implementing novel electromagnetic properties at terahertz frequencies.
16:10 - 16:30 - Coffee break and poster session 2 (continuation)
16:30 - 18:10 - Parallel session Wednesday 4
16:30 - Special session 10 Anisotropic Metamaterials [Show abstract]
The first attempts to realize metamaterials have often aimed at mitigating or eliminating anisotropy and spatial dispersion from the metamaterial inclusions to obtain, often unsuccessfully, a purely isotropic artificial material. As the field matures, however, it is becoming more and more clear how properties like extreme anisotropy and polarization dependence may be used to the great advantage of the designer. This special session will present the most recent advances in the field of anisotropic metamaterials, reporting the intriguing and beneficial effects that properly tailored anisotropy may have for specific applications of interest, from radio to optical frequencies. Applications like cloaking and anti-cloaking, imaging and focusing will be shown by the invited speakers to greatly benefit of the effects of anisotropy in a wide range of wavelengths and of material properties.
Organizer(s): Andrea Alu, The University of Texas at Austin, United States
Session chairperson(s): Andrea Alu, The University of Texas at Austin, United States
16:30 - 16:50 - Detection of subwavelength targets using a dense crossed wire mesh lens Invited [Show abstract] Mário Silveirinha, Instituto de Telecomunicações - Universidade de Coimbra, Portugal Carla Medeiros, Technical University of Lisbon, Instituto Superior Técnico - Instituto de Telecomunicacões, Portugal Carlos Fernandes, Technical University of Lisbon, Instituto Superior Técnico - Instituto de Telecomunicacões, Portugal Jorge Costa, Instituto Superior de Ciências do Trabalho e da Empresa, DCTI, Portugal Here, we demonstrate that a metamaterial lens formed by a dense array of metallic wires enables discriminating targets separated by a subwavelength distance through the effects of the backscattered field on the return loss of a probe antenna. We develop a homogenization model to calculate the backscattered field at the probe antenna position, and demonstrate that in presence of the metamaterial lens the resolving capabilities of the system are greatly enhanced. 16:50 - 17:10 - General classes of anisotropic metamaterial transformation slabs Invited [Show abstract] Vincenzo Galdi, University of Sannio, Department of Engineering, Italy Giuseppe Castaldi, University of Sannio, Department of Engineering, Italy Ilaria Gallina, University of Sannio, Department of Engineering, Italy Andrea Alu, The University of Texas at Austin, Department of Electrical and Computer Engineering , USA Nader Engheta, University of Pennsylvania, Department of Electrical and Systems Engineering, USA This paper presents a study of the electromagnetic properties of certain general classes of metamaterial slabs, inspired by transformation-optics, that exploit their intrinsic anisotropy and inhomogeneity to achieve exotic material properties, within double-positive, double-negative or single-negative constitutive parameters. In particular, we derive some conditions for total transmission, which generalize some previous results in the literature, and explore the image displacement/formation properties, of interest for applications such as radomes, anti-cloaking, and lensing/focusing. 17:10 - 17:30 - Strong spatial dispersion in layered metal-dielectric nanostructures Invited [Show abstract] Pavel Belov, Queen Mary University of London, United Kingdom Alexei Orlov, St. Petersburg State University of Information Technologies, Mechanics and Optics, Russia Alexander Chebykin, St. Petersburg State University of Information Technologies, Mechanics and Optics, Russia Periodic layered metal-dielectric are usually described by local effective medium model if their periods are much smaller than a wavelength. Our studies show that even under such strict conditions the metamaterials are nonlocal and exhibit strong spatial dispersion effects. The uniaxial media support two or more extraordinary waves in certain directions while the local effective model predicts only one. The strong spatial dispersion is caused by surface plasmon polariton modes at the interfaces between metal and dielectric layers. 17:30 - 17:50 - Optical metamaterials with indefinite permittivity: sub-diffraction imaging and negative index propagation Invited [Show abstract] Dmitriy Korobkin, Department of Physics, The University of Texas at Austin, USA Burton Neuner III, Department of Physics, The University of Texas at Austin, USA Chris Fietz, Department of Physics, The University of Texas at Austin, USA Gennady Shvets, Department of Physics, The University of Texas at Austin, USA Indefinite Permittivity Materials (IPMs) presents unique opportunities for sub-wavelength imaging. Such material has a strongly anisotropic permittivity tensor epsilon, with the diagonal components having an opposite sign. Experimental interferometric measurement of the phase delay between different sub-diffraction waves propagating inside the IPM sheds light on the recently discovered phase-sensitive imaging of sub-wavelength objects using an infrared superlens. 17:50 - 18:10 - Engineering photonic density of states with metamaterials Invited [Show abstract] Vladimir Shalaev, Birck Nanotechnology Center, School of Computer and Electrical Engineering, Purdue University, USA Z. Jacob, Birck Nanotechnology Center, School of Computer and Electrical Engineering, Purdue University, USA J.-Y. Kim, Birck Nanotechnology Center, School of Computer and Electrical Engineering, Purdue University, USA G. Naik, Birck Nanotechnology Center, School of Computer and Electrical Engineering, Purdue University, USA V. Drachev, Birck Nanotechnology Center, School of Computer and Electrical Engineering, Purdue University, USA E. Narimanov, Birck Nanotechnology Center, School of Computer and Electrical Engineering, Purdue University, USA A. Boltasseva, Birck Nanotechnology Center, School of Computer and Electrical Engineering, Purdue University, USA We demonstrate the decrease in the spontaneous emission lifetime of dye molecules due to the enhanced photonic density of states (PDOS) of a hyperbolic metamaterial (HMM), opening the route to PDOS engineered HMM devices.
16:30 - Session 10a Analytical and Numerical Modelling 2
Session chairperson(s): Carsten Rockstuhl, Institute of Condensed Matter Theory and Solid State Optics; Friedrich-Schiller-Universität Jena, Germany
16:30 - 16:50 - Synthesis of metamaterial transmission lines through aggressive space mapping Oral [Show abstract] Ferran Martin, Departament d'Engineyria Electrònica, Universitat Autònoma de Barcelona, Spain Jordi Selga, Departament d'Engineyria Electrònica, Universitat Autònoma de Barcelona, Spain Ana Rodriguez, Departamento de Comunicaciones-iTEAM, Universidad Politécnica de Valencia, Spain Vicente E Boria, Departamento de Comunicaciones-iTEAM, Universidad Politécnica de Valencia, Spain Jorge Carbonell, Departamento de Ingeniería Electrónica, Universidad Politécnica de Valencia, Spain In this paper, it is demonstrated that space mapping optimization can be applied to the synthesis of com-plementary split ring resonator (CSRR) -loaded metamaterial transmission lines. Specifically, we make use of the so-called aggressive space mapping. The main relevant aspect of this work is that by means of the developed software, we are able to automatically generate the layout of the different unit cells of the structures, starting from the element values of the equivalent circuit model of such unit cells. As an example, the synthesis of a stop-band filter consisting on a cascade of CSRR-loaded transmission line section is demonstrated. 16:50 - 17:10 - Electromagnetic waves transmission through a carbon nanotube slab: Theoretical model of a carbon nanotube terahertz polarizer Oral [Show abstract] Igor Nefedov, Aalto University, School of Science and Technology, Dept. of Radio Science and Engineering, Finland In this presentation we will analyze terahertz wave transmission through a finite-thickness slab of carbon nanotubes, reflection and absorption. We discuss possible applications of carbon nanotube slabs as terahertz polarizers. 17:10 - 17:30 - Coordinate transformation based device for extraordinary transmission through a sub-wavelength aperture Invited [Show abstract] Wenxuan Tang, Queen Mary, University of London, United Kingdom Francisco Medina-Mena, University of Seville, Spain Yang Hao, Queen Mary, University of London, United Kingdom Coordinate transformation is applied to design the all-dielectric devices for Extraordinary Transmission at microwave frequencies. The proposed device is able to induce more energy of the incident electromagnetic wave into a sub-wavelength aperture leading to a significantly enhancement of the transmission through the aperture. Finite-Difference Time-Domain (FDTD) simulations are used to verify the device’s performance. 17:30 - 17:50 - Collective dynamics in photonic meta-molecules: From light localization to the lasing spaser Oral [Show abstract] Stewart Jenkins, University of Southampton, United Kingdom Nikitas Papasimakis, University of Southampton, United Kingdom Nikolay Zheludev, University of Southampton, United Kingdom Janne Ruostekoski, University of Southampton, United Kingdom We show that uniform optical excitation of partially disordered two dimensional array of interacting metamolecules can lead to the formation of energy hot spots. Such localization undermines the effective medium description of metamaterial structures, and the theoretical framework developed may lay the foundation for the theoretical exploration of the lasing spaser. 17:50 - 18:10 - Characteristics of metamaterial multilayer waveguide slab structure No show, Oral [Show abstract] Mohammed Shabat, Islamic Uiniversity of Gaza, Palestinian Authority Mazen Abadla, Alaqsa University, Palestinian Authority Sofyan Taya, Islamic University of Gaza, Palestinian Authority We examine analytically the propagation characteristics of TE-polarized waves in a four-layer slab waveguide. One of the layers is considered as a metamaterial of simultaneously negative ε and µ. The dispersion relation of such a structure is shown in terms of the normalized thickness and the asymmetry factors. The effect of the doubly negative material parameters on the propagation characteristics has been examined. The variation of the effective index of the structure with different parameters of the layers is studied extensively. A comparison of the structure under consideration with the conventional right handed four-layer waveguide structure is also shown.
16:30 - Session 10b Extraordinary Transmission
Session chairperson(s): Francisco J. Garcia-Vidal, Universidad Autonoma de Madrid, Spain
16:30 - 16:50 - The magical world of metamaterials Invited [Show abstract] Ekmel Ozbay, Bilkent University, Turkey The word “magic” is usually associated with movies, fiction, children stories, etc. but seldom with the natural sciences. Recent advances in metamaterials have changed this notion, in which we can now speak of “almost magical” properties that scientists could only dream about only a decade ago. In this article, we review some of the recent “almost magical” progress in the field of photonic metamaterials. 16:50 - 17:10 - Superconducting plasmonics and extraordinary transmission Oral [Show abstract] A. Tsiatmas, University of Southampton, United Kingdom R. Buckingham, University of Southampton, United Kingdom Vassili Fedotov, University of Southampton, United Kingdom S. Wang , Shanghai Institute of Technical Physics, Chinese Academy of Sciences, China Y. Chen, Micro and Nanotechnology Centre, Rutherford Appleton Laboratory, United Kingdom P. de Groot , University of Southampton, United Kingdom N. I. Zheludev, University of Southampton, United Kingdom Negative dielectric constant and dominant kinetic resistance make superconductors an intriguing plasmonic media. Here we report on the first study of one of the most important and disputed mani-festations of plasmonics, the effect of extraordinary transmission through an array of sub-wavelength holes, using a perforated film of high-temperature superconductor. 17:10 - 17:30 - Extraordinary transmission in dielectric screens induced by 1D periodic defects Oral [Show abstract] Vicente Delgado, University of Seville, Spain Ricardo Marqués, University of Seville, Spain Lukas Jelinek, Czech Technical University in Prague, Czech Republic The paper proposes an analytical theory for extraordinary transmission in low loss dielectric screens with periodic 1D subwavelength defects, such as slits or metallic inclusions. The theory is based on waveguide analysis and in the surface impedance concept. Full wave electromagnetic simulations are used to validate our theory. Electric field computations show that surface modes excited in the screen play a key role in this phenomenon 17:30 - 17:50 - The fields at the metal surface radiated by a subwavelength aperture in a metal film Invited [Show abstract] Jose Luis Martin-Moreno, Instituto de Ciencia de Materiales de Aragon (CSIC), Spain Alexey Yu. Nikitin, Instituto de Ciencia de Materiales de Aragon (CSIC), Spain Sergio G. Rodrigo, Instituto de Ciencia de Materiales de Aragon (CSIC), Spain F. J. Garcia-Vidal, Departamento de Fisica Teorica de la Materia Condensada, Universidad Autonoma de Madrid, Spain The electromagnetic field radiated by a localized source on a metal film has, at the metal surface and in the optical regime, been thought to be dominated by surface plasmon polaritons (SPPs), after a transition region comprising 3- 4 wavelengths from the source. Here, we demonstrate that at sufficiently long distances a different type of wave prevails, which we term Norton waves (NWs) for their resemblance to those found in the radio-wave regime at the surface of the Earth. Norton waves overcome SPPs at distances of about 6-9 SPP absorption lengths, the precise value depending on wavelength and metal. 17:50 - 18:10 - Extraordinary transmission inside closed waveguides Invited [Show abstract] Francisco Medina, Universidad de Sevilla, Spain Francisco Mesa, Universidad de Sevilla, Spain Jorge A. Ruiz-Cruz, Universidad Autonoma de Barcelona, Spain José M. Rebollar, Universidad Politécnica de Madrid, Spain José R. Montejo-Garai, Universidad Politécnica de Madrid, Spain Extraordinary transmission of electromagnetic waves through periodic arrays of holes has been exhaustively studied along the past decade. However, much less attention has been devoted to a similar phenomenon that takes place through small diaphragms inside hollow pipe waveguides. This works presents a theoretical and experimental study of this problem in a circular waveguide. It is shown that the same physics also apply to 2D periodic arrays of holes.
18:10 - 20:00 - Evening break
20:00 - 23:00 - Banquet
08:20 - 10:00 - Parallel sessions Thursday 1
08:20 - Special session 11 Modelling and Homogenization of Metamaterials [Show abstract]
This special session on Modeling and Homogenization of Metmaterials will bring together leading experimentalists and theoreticians in this area. The goal of this session is to highlight the state of the art in the field of Homogenization and Constitutive Parameters Extraction of Metamaterials. Papers pertaining to practical applications of homogenization techniques to embedded antennas and frequency-selective structures will be presented. Fundamental issues such as spatial dispersion will be addressed.
Organizer(s): Gennady Shvets, UT-Austin, United States
Session chairperson(s): Gennady Shvets, UT-Austin, United States
08:20 - 08:40 - Simple and efficient solution for mushroom surfaces – local versus nonlocal homogenization Invited [Show abstract] Alexander B. Yakovlev, University of Mississippi, Department of Electrical Engineering, USA Mario G. Silveirinha, Department of Electrical Engineering – Instituto de Telecomunicações, University of Coimbra, Portugal Olli Luukkonen, Department of Radio Science and Engineering / SMARAD Center of Excellence, Aalto University School of Science and Technology, Finland Constantin R. Simovski, Department of Radio Science and Engineering / SMARAD Center of Excellence, Aalto University School of Science and Technology, Finland Igor S. Nefedov, Department of Radio Science and Engineering / SMARAD Center of Excellence, Aalto University School of Science and Technology, Finland Sergei A. Tretyakov, Department of Radio Science and Engineering / SMARAD Center of Excellence, Aalto University School of Science and Technology, Finland In this paper, we review our recent advancements in homogenization of mushroom-type surfaces and related structures formed as wire-medium slabs loaded with arrays of metallic elements. Local and nonlocal homogenization models are developed for several representative configurations, emphasizing an importance of spatial dispersion on reflection properties and stopband characteristics of high-impedance surfaces. Conditions for suppression of spa-tial dispersion in wire medium are discussed along with various applications of proposed configurations at microwave frequencies. 08:40 - 09:00 - Enhanced Casimir-Lifshitz forces in uniaxial metamaterials Invited [Show abstract] Stanislav Maslovski, Instituto de Telecomunicações, University of Coimbra, Portugal M. G. Silveirinha, Instituto de Telecomunicações, University of Coimbra, Portugal Session: Anisotropic Metamaterials Organizer: Andrea Alù ABSTRACT In this work, we investigate the Casimir-Lifshitz interaction between two bodies embedded in a uniaxial metamaterial. First, we derive the generalized Lifshitz formula for the Casimir interaction energy in stratified uniaxial media. Using this result we show that when mediated by uniaxial magnetodielectrics the Casimir forces can be greatly enhanced. We also demonstrate that in the case of extreme anisotropy (for instance, in uniaxial wire media) the Casimir forces are ultra-long range forces. 09:00 - 09:20 - Spatial and frequency dispersion effects in the homogenization of metamaterial arrays Invited [Show abstract] Andrea Alu, The University of Texas at Austin, United States We discuss inherent and non-negligible anomalous effects, attributable to spatial and frequency dispersion in the homogenization of periodic arrays of nanoparticles. We show that even in simple and commonly used metamaterial configurations, these effects may produce anomalous features, not captured within classic homogenization or retrieval techniques, such as the commonly used Clausius-Mossotti. Our findings are particularly relevant in the homogenization of metamaterials, for which these effects are proven to be at the basis of many of their exotic features. 09:20 - 09:40 - Some case studies of modeling and homogenization of metamaterials for practical applications Invited [Show abstract] Raj Mittra, Penn State University, USA Kyungho Yoo, Penn State University, USA In this paper we examine the issue of homogenization of metamaterials (MTMs) when modeling practical devices that are based upon the use of these materials for various applications such as cloaking, directivity enhancements of antennas, size reduction, focusing, etc. 09:40 - 10:00 - SPIDER: A new THz nonlinear effect in nanostructures Invited [Show abstract] Mark Stockman, Georgia State University, USA Maxim Durach, Georgia State University, USA Anastasia Rusina, Georgia State University, USA In this talk, we describe a new, recently predicted nonlinear effects in plasmonics: giant surface plasmon-induced drag effect (SPIDEr), which exists under conditions of the extreme nanoplasmonic confinement. In nanowires, this giant SPIDEr generates rectified THz potential differences up to 10 V and extremely strong electric fields up to ~ 10^5 − 10^6 V/cm. The giant magnitude of the SPIDEr is due to the very high gradients of the plasmonic fields and their large magnitudes in very thin plasmonic nanowires. The giant SPIDEr is an ultrafast effect whose bandwidth for nanometric wires is ~ 20 THz. It opens up a new field of ultraintense THz nanooptics with wide potential applications in nanotechnology and nanoscience, including microelectronics, nanoplasmonics, and biomedicine.
08:20 - Session 11a Plasmonic Metamaterials 1
Session chairperson(s): Sailing He, Joint Research Center of Photonics of the Royal Institute of Technology (Sweden) and Zhejiang University (China), China
08:20 - 08:40 - Semiconductor and dielectric building blocks for metamaterials Invited [Show abstract] Mark Brongersma, Stanford University, USA Metamaterials and nanophotonic devices are most commonly constructed from metallic (i.e. plasmonic) nanostructures. However, recent research has begun to also exploit the optical resonances of high-permittivity semiconductor and dielectric nanostructures to realize similar optical functionalities. In this talk, I will illustrate the use of plasmonic, semiconductor, and dielectric nanostructures in metamaterials and a variety of nanophotonics applications (sources, modulators, detectors) and discuss their relative strengths and weaknesses. 08:40 - 09:00 - Mode interaction and enhanced transmission in a phase-conjugated metallic meander cavity Oral [Show abstract] Liwei Fu, 4th Physics Institute, University of Stuttgart, Germany Heinz Schweizer, 4th Physics Institute, University of Stuttgart, Germany Thomas Weiss, 4th Physics Institute, University of Stuttgart, Germany Philipp Schau, Institut für Technische Optik, University of Stuttgart, Germany Karsten Frenner, Institut für Technische Optik, University of Stuttgart, Germany Wolfgang Osten, Institut für Technische Optik, University of Stuttgart, Germany Harald Giessen, 4th Physics Institute, University of Stuttgart, Germany Low-loss enhanced transmission with negative refraction at visible wavelengthes has been demonstrated in metallic meander cavities, which is promising for the realization of far-field subwavelength imaging and other functional devices. In order to gain more physical insight into the structures, mode interaction among the surface plasmon polaritons and Fabry-Perot cavity modes in a silver meander cavity with varying meander depth and cavity length has been numerically studied in this contribution. 09:00 - 09:20 - Semiconductor plasmonic materials for telecom wavelengths Oral [Show abstract] M. A. Noginov, Norfolk State University, USA Lei Gu, Norfolk State University, USA J. E. Livenere, Norfolk State University, USA G. Zhu, Norfolk State University, USA A. K. Pradhan, Norfolk State University, USA R. Mundle, Norfolk State University, USA M. Bahoura, Norfolk State University, USA Yu. A. Barnakov, Norfolk State University, USA V. A. Podolskiy, University of Massachusetts Lowell, USA We study degenerate wide-gap semiconductors as potential plasmonic materials. We show that for the same level of confinement, the surface plasmon polaritons (SPP) loss in semiconductors is lower than that in gold. 09:20 - 09:40 - Towards three-dimensional isotropic metamaterials Invited [Show abstract] Takuo Tanaka, RIKEN Advanced Science Institute, Japan The electromagnetic properties and design strategy of plasmonic metamaterials in the optical spectral range are theoretically investigated. The laser fabrication technique for the three-dimensional isotropic metama-terials is also proposed. Three-dimensional nanometer-scale silver or gold structures are demonstrated. 09:40 - 10:00 - Holey structured metamaterials Invited [Show abstract] Francisco J. Garcia-Vidal, Universidad Autonoma de Madrid, Spain In this presentation we will describe how a metallic film perforated with a periodic array of subwavelength holes can behave as a metamaterial structure when the operating wavelength is much larger than the period of the array both for electromagnetic and acoustic waves.
08:20 - Session 11b Advances in Cloaking
Session chairperson(s): Ulf Leonhardt, University of St Andrews, United Kingdom
08:20 - 08:40 - Dynamic electromagnetic cloaking: External field control, magneto-optics and novel designs Oral [Show abstract] Martin W. McCall, Imperial College London, United Kingdom Alberto Favaro, Imperial College London, United Kingdom Paul Kinsler, Imperial College London, United Kingdom Allan D. Boardman, Salford University, United Kingdom Cloaking algorithms offer more power than is generally appreciated. We exploit the full freedom of the formalism to propose designs utilizing nonlinearity, space+time variation, and polarisation dependence. Our work paves the way to the invention of novel devices: e.g. a “single-polarisation” cloak. 08:40 - 09:00 - Enhancement of NSOM tip performances through the employment of metamaterials Oral [Show abstract] Filiberto Bilotti, University ROMA TRE, Italy Simone Tricarico, University ROMA TRE, Italy Luca Scorrano, University ROMA TRE, Italy Lucio Vegni, University ROMA TRE, Italy We present some ideas to enhance the performances of NSOM tips through the employment of metamaterials. Two major problems of the NSOM tips are: a) the reduced light throughput (aperture probes) and b) low SNR due to the scattering from the metallic tip (aperture-less probes). We show that by using a cloak of invisibility partially coating an aperture-less NSOM tip it is pos-sible to reduce the scattering from the tip without loosing the needed strong interaction between the tip and the sample to be imaged. Some techniques to enhance the light transmission through sub-wavelength apertures are also proposed. 09:00 - 09:20 - 3D optical carpet cloak Invited [Show abstract] Nicolas Stenger, Karlsruhe Institute of Technology, Germany Tolga Ergin, Karlsruhe Institute of Technology, Germany Jad C. Halimeh, Max Planck Institut für Quantenoptik and Ludwig-Maximilians-Universität, Germany Martin Wegener, Karlsruhe Institute of Technology, Germany We review our recent experiments and on a three-dimensional version of the carpet cloak. Structure and controls are fabricated by direct laser writing and characterized by optical microscopy. 09:20 - 09:40 - Plasmonic cloaking of finite cylinders Oral [Show abstract] Dave Rainwater, ARL:UT, USA Andrea Alu, University of Texas at Austin, USA Aaron Kerkhoff, ARL:UT, USA Plasmonic metamaterial cloaking has recently shown great promise for creating practical electro-magnetic cloaks. In particular, the potential for true isotropicity with reasonably wide bandwidth. However, legitimate questions have been raised about the ideal cases and special configurations used to study their application to non-spherical geometries. We address this criticism here with a broad, in-depth analysis of finite cylinder cloaks under oblique angle illumination. We find that cloaking is robust and well-understood, even for very small aspect ratios and at extremely oblique incidence. 09:40 - 10:00 - Transmission-line cloaks of various electrical sizes Oral [Show abstract] Pekka Alitalo, Aalto University School of Science and Technology, Finland Sergei Tretyakov, Aalto University School of Science and Technology, Finland In this paper we show how the previously presented design of a cylindrical transmission-line cloak can be modified in order to increase the cloak's electrical size. We also confirm that the operation of the transmission-line cloak is not based on resonant effects and therefore changes in its electrical size do not cause major changes in the cloak's operation.
10:00 - 11:20 - Coffee break and poster session 3
10:00 - Poster session 3
1 - Sub-wavelength imaging with resonant multi-meander structures [Show abstract] Philipp Schau, Institut fuer Technische Optik, Universitaet Stuttgart, Germany Karsten Frenner, Institut fuer Technische Optik, Universitaet Stuttgart, Germany Wolfgang Osten, Institut fuer Technische Optik, Universitaet Stuttgart, Germany Liwei Fu, 4th Physical Institute, Universitaet Stuttgart, Germany Heinz Schweizer, 4th Physical Institute, Universitaet Stuttgart, Germany We find that energy transfer at low loss between multiple resonantly coupled meander surfaces can be achieved for practically arbitrary distances. This could enable a controlled transformation of evanescent modes to traveling wave modes of higher diffraction order useful for superlens operation. 2 - Artificial magnetism and backward waves in terahertz regime from arrays of resonant TiO2 spheres [Show abstract] Sylvain Lannebere, Centre de Recherche Paul Pascal (CRPP), Laboratoire de l’Int´egration du Mat´eriau au Syst`eme (IMS), CNRS-University of Bordeaux, France Valérie Vigneras, Laboratoire de l’Int´egration du Mat´eriau au Syst`eme (IMS), CNRS-University of Bordeaux, France Ashod Aradian, Centre de Recherche Paul Pascal (CRPP), CNRS-University of Bordeaux, France We investigate the design of artificial (negative) permeability and backward-wave metamaterials in the terahertz range from arrays of dielectric TiO2 spheres embedded in a host medium. We study artificial magnetism arising from arrays of such spheres, both analytically and numerically. We also show that, due to interparticle coupling, bidisperse arrays of real material spheres in the terahertz are unable to provide double-negativity. However, we find that a new physical mechanism takes over and that there are bands of backward waves (despite a positive refractive index) that appear both in bidisperse and monodisperse arrays. 3 - Study of surface plasmon resonances on rectangular slits in thin Ag films by low-loss EFTEM Imaging [Show abstract] Burcu Ögüt, Max Planck Institute for Metals Research, Germany Wilfried Sigle, Max Planck Institute for Metals Research, Germany Christoph Koch, Max Planck Institute for Metals Research, Germany Peter van Aken, Max Planck Institute for Metals Research, Germany In this experiment we investigate the surface plasmon resonances (SPRs) on rectangular silver slits by us-ing low-loss energy-filtering transmission electron microscopy (EFTEM) at energies between 0.4 and 4.6 eV. In addition, optical simulations have also been performed on these structures by using a Discrete Dipole Approxi-mation Code (DDSCAT). 4 - Role of surface plasmon polariton excitation and enhanced optical transmission in metallic grating structures [Show abstract] Viktoriia Babicheva, Moscow Institute of Physics and Technology (State University), Russia Yurii Lozovik, Institute for Spectroscopy of Russian Academy of Sciences, Russia We study the extraordinary transmission in structures composed of two gratings and the conditions at which the transmittance is equal to zero. An efficiency of the transmission of the slit mode of the grating into the thin film is greater than an efficiency of the transmission of plane wave into the same film. 5 - Modelling of metamaterials based on ferromagnetic wiresNo show, [Show abstract] Jorge Carbonell, Universidad Politécnica de Valencia, Spain Héctor García-Miquel, Universidad Politécnica de Valencia, Spain José Sánchez-Dehesa, Universidad Politécnica de Valencia, Spain Ferromagnetic microwires are investigated as fundamental components to generate metamaterials with double negative parameters. Electric and magnetic responses are, respectively, based on the finite conductivity and fer-romagnetic resonance of the wires that in turn depend on their chemical composition. Tuning properties of sam-ples are investigated in terms of an applied magnetic field. The samples are measured and simulated in a waveguide environment for a large microwave frequency range. Numerical modelling supports the experimental results and helps to understand the physics involved in the transmission phenomena. Radius and conductivity of the wires are pointed out as the most critical parameters to generate a double negative response. 6 - Field propagation characteristics in subwavelength optical coaxial nano-waveguides [Show abstract] Olga Kozina, Saratov Branch of the Institute of Radio-Engineering and Electronics of Russian Academy of Science, Russia Leonid Melnikov, Saratov State Technical University, Russia Igor Nefedov, Aalto University, School of Science and Technology, Finland In this paper we investigate the field propagation characteristics in new optical waveguides, made of glasses and noble metals. The proposed waveguide, having nanosize cross-section, supports propagation of modes with unusual propagation properties. The propagation speed, attenuation and field localization of those modes will be presented. The proportional reducing of the coaxial scale has been investigated. The comparatively low value of losses will be explained. 7 - Spectroscopic ellipsometry study of a Swiss cross metamaterial [Show abstract] Maria de Lourdes Miranda Medina, Instituto Nacional de Astrofísica, Óptica y Electrónica, Mexico Babak Dastmalchi, Center for Surface and Nanoanalytics, and Christian Doppler Lab for Surface Optics Johannes Kepler University , Austria Holger Schmidt, Microstructure Technology & Microoptics, Institute of Applied Physics, Friedrich-Schiller-University, Germany E.-Bernhard Kley, Microstructure Technology & Microoptics, Institute of Applied Physics, Friedrich-Schiller-University, Germany Iris Bergmair, Functional Surfaces and Nanostructures, Profactor GmbH, Austria Kurt Hingerl, Center for Surface and Nanoanalytics, and Christian Doppler Lab for Surface Optics Johannes Kepler University , Austria We present for a Swiss cross metamaterial spectroscopic ellipsometry measurements (VASE), taken under variable angle of incidence and compare them with calculations based on rigorous coupled wave analysis (RCWA). We find that the resonances of the ellipsometric paramenters do not disappear by varying the angle of incidence, however some resonance peaks shift in energy on the UV and visible region. 8 - Surface microwaves of a bianisotropic-ferrite metasandwich [Show abstract] Valery Butylkin, Institute of Radioengineering & Electronics RAS, Russia Galina Kraftmakher, Institute of Radioengineering & Electronics RAS, Russia Valery Mal'tsev, Institute of Radioengineering & Electronics RAS, Russia Surface waves that formed in free space by metastructures consisting of a ferrite and a bianisotropic layer with resonant anisotropic chirality, permittivity, and permeability are investigated theoretically and numerically 9 - Structure-property relations in negative permittivity Reststrahlen materials for IR metamaterial applications [Show abstract] Jon Ihlefeld, Sandia National Laboratories, USA James Ginn, Sandia National Laboratories, USA David Shelton, University of Central Florida, USA James Carroll, Sandia National Laboratories, USA Mark Rodriguez, Sandia National Laboratories, USA Glenn Boreman, University of Central Florida, USA Paul Clem, Sandia National Laboratories, USA Michael Sinclair, Sandia National Laboratories, USA We will present a study of the structure-property relations in Reststrahlen materials that possess a band of negative permittivities in the infrared. It will be shown that sub-micron defects strongly affect the optical response, resulting in significantly diminished permittivities. This work has implications on the use of ionic materials in IR-metamaterials. 10 - Fabrication and optical characterisation of gold nanowire arrays [Show abstract] Christina Lucia McClatchey, Queen's University Belfast, United Kingdom Robert James Pollard, Queen's University Belfast, United Kingdom Arrays of gold nanowires have been grown via direct electrodeposition into an alumina template. The optical behaviour of these nanowires was investigated. Plasmonic resonances sensitive to changes in the dielectric environment surrounding the nanowires were found in both direct transmission and ATR geometry, making gold nanowires suitable for many applications, including label-free biosensing. 11 - Dual-band Antenna for WLAN application with EBG [Show abstract] Mohamad mantash, Université de Rennes 1, Institute of Electronics and Telecommunications of Rennes, France Anne-claude TAROT, Université de Rennes 1, Institute of Electronics and Telecommunications of Rennes, France Sylvain Collardey, Université de Rennes 1, Institute of Electronics and Telecommunications of Rennes, France Kouroch Mahdjoubi, Université de Rennes 1, Institute of Electronics and Telecommunications of Rennes, France In this paper, we propose to enhance the performances of a CPW dual-band monopole antenna, for WLAN application, using an EBG surface. The dual-band EBG substrate is an array of 3 x 3 concentric squares, which acts as a high-impedance surface (HIS). The aim is to reduce the surface waves and then to enhance the gain. 12 - Plasmonic nanolens integrated with dielectric matrix No show, [Show abstract] Piotr Wróbel, University of Warsaw, Poland Tomasz J. Antosiewicz, ICM University of Warsaw, Poland Tomasz Szoplik, University of Warsaw, Poland Our silver nanolens is composed of annular metal rings and on-axis stop. The lens is integrated with an optical fibre and anticorrosion cladding. When illuminated with a radially polarized Laguerre-Gaussian beam it acts as a high numerical aperture lens, i.e. focuses light into subwavelength foci. An optimised structure transmits 80% of incident light. 13 - Design of a Compact Slot-Loaded EBG Structure and It’s Application in a Low-Profile Antenna [Show abstract] Masoome Rezaei Abkenar, Semnan University, Iran Pejman Rezaei, Semnan University, Iran In this paper a novel compact slot-loaded EBG surface is presented and compared with the conventional mushroom-like EBG structure. Simulations results have verified that the size of the slot-loaded EBG cell is reduced by 20%. This structure has been used as ground plane to improve radiation efficiency of a low profile dipole antenna. 14 - Indefinite media using high aspect-ratio metallic nanowires in dielectric nanoporous alumina templates [Show abstract] Luis Custodio, IN-IFIMUP and Physics and Astronomy Department, University of Porto - Science Faculty, Portugal Celia Tavares Sousa, IN-IFIMUP and Physics and Astronomy Department, University of Porto - Science Faculty, Portugal Joao Pedro Araujo, IN-IFIMUP and Physics and Astronomy Department, University of Porto - Science Faculty, Portugal We have used the Bruggeman effective-medium model to plan and simulate specific Indefinite-Media, which were then implemented using arrays of metallic nanowires electrodeposited in anodic nanoporous alumina templates. We explain the versatility of the used methods, and the varying parameters. Prospects on promising applications such as hyperlenses are also highlighted. 15 - Experimental retrieval of the permittivity and permeability tensors of biaxial metamaterialsWithdrawal, [Show abstract] Liming Ji, University of Arkansas, USA Vasundara Varadan, University of Arkansas, USA In this paper, we experimentally characterized a biaxial split ring resonator (SRR) sample. Four metal SRRs on FR4 substrate with alternating perpendicular gap orientations form a symmetric and polarization insensitive unit cell. Based on the SRR orientations, we defined three principal axes perpendicular to each other. Four measurements were performed to characterize all six tensor parameters. The measured refractive indices are dependent on the polarization of the incident wave, and we obtained nearly zero refractive index when electric and magnetic resonances occurred simultaneously. 16 - Metamaterial mediated particle wave energy exchange [Show abstract] Yap Soon Tan, Dept. Physics, Lancaster University, United Kingdom Rebecca Seviour, Dept. Physics, Lancaster University, United Kingdom We show that the introduction of a metamaterial at the interaction point between the wave and beam gives rise to a novel dispersion curve determines a unique wave particle relationhsip. Using a modified form of Madey's theorem we find that the novel dispersion of the metamaterial leads to an amplification of the EM wave power. We also show that the form factor in Madey's theorem can be defined by the specific design of the metamaterial unit cell, and thus by changing the sign of the form factor energy can also be transferred from beam to wave. 17 - Surface electromagnetic waves guided by the interface of two enantiomorph bianisotropic mediaNo show, [Show abstract] R.H. Tarkhanyan, Institute of Radiophysics and Electronics, Armenia D.G. Niarchos, Institute of Materials Science, NCSR Demokritos, Greece A new class of nonradiative surface electromagnetic waves propagating along the interface of two enantiomorph anisotropic chiral media is predicted. The waves are caused by bianisotropy and are absent in the case of enantiomorph bi-isotropic materials. 18 - Thin-film plasmonic polarizer [Show abstract] Sergey Moiseev, V.A. Kotelnikov Institute of Radio Engineering and Electronics of Russian Academy of Sciences, Ulyanovsk Branch, Russia Reflection and transmission of a thin composite layer consisting of a transparent dielectric matrix with inclusion of silver ellipsoidal nanoparticles are investigated theoretically. It is shown that anisotropic plasmonic absorption in nanoparticles leads to polarization-dependent reflectance and transmittance of composite coating on a substrate. 19 - Finite element method with genetic algorithms to optimize the high impedance surface based on self resonant grids [Show abstract] Nadia Lassouaoui, University of Paris Ouest Nanterre la Défense, France H. Hafdallah Ouslimani, University of Paris Ouest Nanterre la Défense, France A. Priou, University of Paris Ouest Nanterre la Défense, France In this paper, a high impedance surface HIS with a planar self-resonant grid from metal strips is studied. Its advantages are shifting down the resonant frequency and angular stabilization of surface impedance for the TE-incidence of the waves. Here in, we develop and integrate the genetic algorithms in CST Microwave Studio to allow an automatic research of the material characteristics of the HIS (substrate and the grid of FSS) which ensure the resonance at desired frequency. Numerical results are presented. 20 - Resonance characterization of High Impedance Surface (HIS) properties by suspended strip-line method [Show abstract] C. T. Manh, LEME - University Paris West Nanterre, France H. H. Ouslimani, LEME - University Paris West Nanterre, France A. C. Priou, LEME - University Paris West Nanterre, France H. Teillet, Thales Communications, France J. Y. Daden, Thales Communications, France Electromagnetic bandgap (EBG) structures become nowadays very attractive in the electromagnetic and antenna application. In this category of EBG, High Impedance Surface (HIS) structures have been widely studied since they show a particularly interesting in antenna application. In this paper we introduce 2 motifs of HIS structures optimized for the millimeter-wave domain. We present the technique of suspended microstrip line for characterizing the resonant property of HIS structures. This technique is easy to implement in coaxial setup. The results are presented in simulations and measurements 21 - Transmission of a near-field in the infrared range by means of periscope-like endoscope [Show abstract] Atiqur Rahman, Queen Mary University of London, United Kingdom Pavel Belov, Queen Mary University of London, United Kingdom Yang Hao, Queen Mary University of London, United Kingdom Clive Parini, Queen Mary University of London, United Kingdom A possibility to transmit near-field through a periscope-like endoscope formed by an array of bent metallic rods is investigated. This is a first step on the way to development of flexible near-field endoscopes. An effort to tunnel the near-field of a crown-shaped object through the periscope with 45 deg bending angle is made and a shift in the operating frequency band with respect to that of the straight endoscope is observed. A distinctive nature of surface waves appearing at both interfaces has also been reported. 22 - Enhanced backscattering of light from randomly rough gratings on negative magnetic metamaterials [Show abstract] Ramon Paniagua Dominguez, Instituto de Estructura de la Materia, Consejo Superior de Investigaciones Científicas, Spain José Antonio Sánchez Gil, Instituto de Estructura de la Materia, Consejo Superior de Investigaciones Científicas, Spain Pablo Albella, Grupo de Óptica, Departamento de Física Aplicada, Universidad de Cantabria, Spain José María Sáiz, Grupo de Óptica, Departamento de Física Aplicada, Universidad de Cantabria, Spain Francisco González, Grupo de Óptica, Departamento de Física Aplicada, Universidad de Cantabria, Spain Fernando Moreno, Grupo de Óptica, Departamento de Física Aplicada, Universidad de Cantabria, Spain We investigate the scattering formalism of the Green's theorem including a discontinuity in the magnetic permeability (isotropic and homogeneous) and possible negative values. For this purpose we make use of the continuity conditions for the EM field across the interface between media having different permittivity and permeability. In the case of linearly polarized incident light and rough gratings, we find a symmetry in the intensity of the scattered fields between s- and p-polarizations when interchanging the values of the permittivity and permeability. 23 - Electromagnetic energy density in a dispersive and absorptive chiral metamaterials [Show abstract] Yao-Ting Wang, National Central University, Taiwan Pi-Gang Luan, National Central University, Taiwan The energy density for electromagnetic fields in a dispersive and absorptive chiral metamaterial medium is de-rived. The metamaterial consists of periodically arranged helical or twisted split-ring resonators. We further prove that the same energy density formula also applies if bi-anisotropy is introduced. 24 - Localized nonlinear plasmonic cavity modes in two-dimensional distributions of metallic nanowires [Show abstract] Claudiu Biris, Department of Electronic and Electrical Engineering, UCL, United Kingdom Nicolae Panoiu, Department of Electronic and Electrical Engineering, UCL, United Kingdom This paper investigates the nonlinear generation of localized nonlinear plasmon modes and nonlinear cavity modes in metallic nanowires employing the multiple scattering theory. Our results show that two types of localized nonlinear plasmon modes can be formed: modes generated via the hybridization of modes of single nanowires and cavity modes. 25 - On the question of semiclassical nano laser description [Show abstract] Arkadi Chipouline, Friedrich Schiller University Jena, Germany A. Chirkin , Faculty of Physics, Lomonosov State University, Moscow, Russia E. Pshenay-Severin, Friedrich Schiller University Jena, Germany M. Mundus, Friedrich Schiller University Jena, Germany T. Pertsch, Friedrich Schiller University Jena, Germany A semi classical model for nano lasers based on density matrix formalism for gain media and a harmonic oscillator for the plasmonic excitation is presented. Dynamics of the nano laser is investigated for different ge-ometries, allowing for symmetric (dipole) and asymmetric (quadrupole) oscillation modes. Statistical character-istics of laser dynamics are presented. 26 - Nonlinearity caused by local field effects between a two level system and a metamaterial [Show abstract] Juan Luis Garcia-Pomar, Frauhofer Institute IPM, Germany Renè Beigang, Frauhofer Institute IPM, University of Kaiserslautern:Department of Physics, Germany Marco Rahm, Frauhofer Institute IPM, University of Kaiserslautern: Department of Physics, Germany We present a theoretical analysis of the nonlinear response of a system based on a split ring resonator metamaterial coupled to a two level system without inversion. We calculated the total electric susceptibility and the linear, third and fifth-order solution of the Maxwell Bloch equations. Additionally, we studied the nonlinear dynamics in the hybrid system. 27 - Symmetry analysis of planar electromagnetic arrays in the long--wave approximation [Show abstract] Victor Dmitriev, Federal University of Para, Brazil In this paper, we discuss some aspects of the problem of electromagnetic wave scattering from planar arrays in long-wave approximation. We use two different approaches to the problem. The first approach is the description in terms of the scattering matrix relating electric field components in two parallel reference planes. The second one is based on the scattering matrix written in terms of electric field components in individual coordinate systems associated with wave vectors of incident and reflected waves. Using group-theoretical methods, we define the structure of the matrices for some arrays including those composed from nonreciprocal media and discuss their properties. 28 - Inverted L antenna on periodic structureNo show, [Show abstract] Amir Hossein Amin Beidokhti, Electrical Engineering and Computer Faculty, Semnan University, Iran Pejman Rezaei, Electrical Engineering and Computer Faculty, Semnan University, Iran In this paper, a method for improving characterizations of antennas, especially in order to increase their gain and band width, is presented. This method is using metamaterial in electromagnetic perfomances. At first, an initial Inverted L Antenna (ILA) is designed and its radiation properties is took into consideration. Then by adding ground plane and metamaterial, changes in antenna's band width, radiation beam and gain is observed. The purpose of these designs and simulations is getting to the desirable effects of metamaterials on ILA radiation beam. NEC software, that its performance is based on numerical moment method, is used for simulating ILA, ground plane and metamaterial. 29 - 3D DNA-like crystals microwave analogy for studying polarization selectivity properties [Show abstract] Igor Semchenko, Gomel State University, Belarus Sergei Khakhomov, Gomel State University, Belarus Alexei Balmakov, Gomel State University, Belarus In this article, by the example of the octahedron and cube, composed of DNA-like helices, we proved that complex 3D DNA-like structures can also display the polarization selectivity properties at the processes of interaction with polarized electromagnetic fields. 30 - Singular wave scattering by left-handed material slab with dielectric inhomogeneity [Show abstract] Mikhail Barabanenkov, Institute of Microelectronics Technology Russian Academy of Science, Russia Yurii Barabanenkov, Institute of Radioengineering and Electronics, Russian Academy of Sciences, Russia Sergey Nikitov, Institute of Radioengineering and Electronics, Russian Academy of Sciences, Russia We extend the traditional potential wave multiple scattering theory to analytical study an inhomogeneous and absorbing LHM slab focusing properties by the Green function method. A specific multiplicative quasistatic singularity of the Green function is revealed provided a thin inhomogeneity is placed near focus inside perfect LHM slab. This sort of singularity is directly linked with concept about spatial transformation media. 31 - Exact solution for lossy wave transmission through graded interfaces between RHM and LHM mediaNo show, [Show abstract] Mariana Dalarsson, Royal Institute of Technology, Stockholm, Sweden, Sweden Martin Norgren, Royal Institute of Technology, Stockholm, Sweden, Sweden The transmission and reflection properties of lossy structures involving left-handed materials with graded permittivity and permeability has been investigated. We present an exact analytical solution to Helmholtz’ equation for a lossy case with the graded real parts of permittivity and permeability profile changing according to a hyperbolic tangent function along the direction of propagation. The expressions and graphical results for the field intensity along the graded structure are presented. The model straightforwardly allows for arbitrary temporal dispersion. 32 - Electromagnetic response of a mushroom surface from microwave to infrared wavelength [Show abstract] Stefan Enoch, Institut Fresnel, CNRS and Aix-Marseille Université, France Nicolas Mallejac, CEA, France The validity of the downscaling of a mushroom structure is investigated. It is shown that the electromagnetic resonances occur at the same values of λ/period from the microwave to the far infrared. 33 - Near-field imaging with silver superlens [Show abstract] Timo Hakkarainen, Department of Applied Physics, Aalto University, Finland Tero Setälä, Department of Applied Physics, Aalto University, Finland Ari T. Friberg, Department of Applied Physics, Aalto University, Finland Making use of exact and quasi-static expressions for the field in near-field imaging of a point dipole by a thin silver slab, we calculate the point-spread function and the associated image resolution.We show that the resolution, which depends on the silver slab thickness and the dipole orientation, generally is better than the conventional diffraction limit and can be as high as lambda/8. The results agree well with recent theoretical and experimental studies on 2D objects. 34 - Permeability spectrum reference sample: a metamaterial approach [Show abstract] Marc Ledieu, CEA, DAM, Le Ripault, France Olivier Archer, HORIBA Jobin Yvon, France Nicolas Mallejac, CEA, DAM, Le Ripault, France In this paper, we present a reference sample for frequency magnetic permeability measurements. It is based on metamaterial inclusions, and contains no magnetic materials though it has a significant magnetic re-sponse. It is proved to be insensitive to external magnetic fields and temperature fluctuations. 35 - Modeling small arrays of spirals with strong Interactions [Show abstract] Diana Strickland, Southwest Research Institute, USA Jerome Helffrich, Southwest Research Institute, USA Jeremy Pruitt, Southwest Research Institute, USA We present a simple analytic method for incorporating the effects of strong coupling to predict the resonance frequencies of small arrays of magnetic metamaterials. The models predict strong coupling within our arrays and enhanced sensitivity to the number of cells with the strength of the interaction, consistent with measured data. 36 - Reduction of the E plane coupling between microstrip antenna arrays using High Impedance Surface [Show abstract] Han Xiaoke, Université Paris Ouest Nanterre la Défense, France Habiba Hafdallah Ouslimani, Université Paris Ouest Nanterre la Défense, France Alain Priou, Université Paris Ouest Nanterre la Défense, France In this paper, the electromagnetic band-gap (EBG) feature of high impedance surface (HIS) Mushroom-like and 4-F-like have been studied by CST for application at frequencies around 10 GHz. Those HIS structures are inte-grated into an antenna arrays system to reduce the mutual coupling by suppressing the surface wave inside their bandgap. Since the surface courant propagate in the E direction, the coupling is stronger than in the H plane. The investigation is done in the E coupling direction. A significant mutual coupling reduction 11.3 dB is reached at 10 GHz and ~28 dB at 10.07 GHz. 37 - Multi-function and multi-polarization patch antennas [Show abstract] Fanhong Meng, Université Paris Ouest Nanterre La Défense, France Habiba Hafdallah Ouslimani, Université Paris Ouest Nanterre La Défense, France Alain Priou, Université Paris Ouest Nanterre La Défense, France Yohann Duval, EADS - European Aeronautic Defense & Space company, Innovation Works , France For aeronautical applications, the GPS (1.57 GHz, omnidirectional radiation pattern, circular polarization) and DME (1.1 GHz, monopolar radiation pattern, vertical polarization) functions are studied. By many cases, these two antenna types must be grouped on a single patch antenna, A multi-function and multi-polarization patch antenna using metamateriel HIS is proposed and discussed. We will demonstrate that it will be possible to obtain one antenna type operating at two frequency bands by using High impedance surface 38 - Photoconductive antenna with split ring resonators for terahertz radiation [Show abstract] Keisuke Takano, Osaka University, Japan Taku Kawabata, Osaka University, Japan Kazuhiro Murata, AIST, Japan Kazuyuki Masuda, SIJTechnology, Inc., Japan Fumiaki Miyamaru, Shinshu University, Japan Masanori Hangyo, Osaka University, Japan Photoconductive antennas with split-ring resonators are fabricated with super-fine ink-jet printing technology. The terahertz spectrum radiated from the photoconductive antennas with the split-ring resonator shows a peak near the resonance frequency of the split-ring resonator. The split-ring resona-tors are applicable to designing the radiation spectra of the photoconductive antennas. 39 - Cylindrical surface plasmon modes in gold nanotube arrays [Show abstract] Antony Murphy, Queen's University Belfast, United Kingdom Gregory Wurtz, University of North Florida, USA Robert Pollard, Queen's University Belfast, United Kingdom Gold nanotube arrays exhibit different cylindrical surface plasmon modes when excited at normal and oblique incidence. Optical extinction measurements along with harmonic and eigenmode modelling have been used to determine the origin of these modes. 40 - Predictions of resonant frequency shifts in asymmetrical cut-wire metamaterials [Show abstract] Hiroki Wakatsuchi, University of Nottingham, United Kingdom John Paul, University of Nottingham, United Kingdom In this paper equivalent circuits for single cut-wire (CW) metamaterials and symmetrical paired CW metamaterials are introduced. The resonant frequencies estimated by the equivalent circuits qualitatively agree with those by numerical simulations, the differences being smaller than about 6 %. 41 - Sub-wavelength plasmonic lattice solitons in one- and two-dimensional arrays of metallic nanowires [Show abstract] Fangwei Ye, Hong Kong Baptist University, China Nicolae Panoiu, University College London, United Kingdom We present the first theoretical study of plasmon solitons formed in one- and two-dimensional arrays of metallic nanowires. We demonstrate that the plasmonic arrays support unstaggered and staggered solitons, as well as vortex solitons, whose size can be significantly smaller than the wavelength. 42 - Optical rectification effect at normal incidence in asymmetric metamaterial [Show abstract] Hiroyuki Kurosawa, Tohoku University, Japan Takafumi Hatano, Tohoku University, Japan Teruya Ishihara, Tohoku University, Japan Naoki Ikeda, National Institute for Materials Science, Japan Daiju Tsuya, National Institute for Materials Science, Japan Masayuki Ochiai, National Institute for Materials Science, Japan Yoshimasa Sugimoto, National Institute for Materials Science, Japan We investigated optical rectification effect at normal incidence in non-diffraction regime which is not expected from simple momentum conservation between light and free carriers in 1D grating slab. It is clarified that the optical rectification signal is due to the asymmetric excitation of surface plasmon polariton. 43 - Novel resonant structures in transmission and reflection by a very thin two-dimensional photonic crystal on a substrate [Show abstract] Yasushi Ohfuti, University of Electro-Communications, Japan It is shown that by the combination of the multiple scattering within the two-dimensional photonic crystals and the multiple reflection at the interfaces, novel very sharp resonant structures appear in transmission and reflection perpendicular to the periodic plane. 44 - SRR miniaturization for patch antenna stacked with metamaterial substrate [Show abstract] Hicham Lalj , EMSI / IETR, INSA of Rennes, Morroco / France Hafid Griguer, EMSI / IETR, INSA of Rennes, Morroco / France M'hamed Drissi, IETR,INSA of Rennes, France The use of the metamaterial substrates for the Patch antennas constitutes an interesting approach for the reduction and for the improvement of antenna performances such as impedance band width BW. The reduction of the Meta-Substrate Thickness is an important solution to ameliorate the antenna radiation efficiency ηr. Several techniques of miniaturization of the metamaterial cells are present in the state of the art; the published studies show a 2 to 2.5 times size reduction of the basic unit cell. 45 - On the effectiveness of a Z element for enhancement of the matching, gain and the reactive near fields of a small antenna [Show abstract] Samantha Caporal Del Barrio, Aalborg University, Denmark Ivan Bonev, Aalborg University, Denmark In this paper, an electrically small antenna with a parasitic Z-shaped element is presented. Compared to the previously proposed design, it has been proved that even if the Z element is disconnected from the ground plane, it still works as a natural matching network for the antenna. Two designs for two different frequency bands have been presented. The natural matching property has been demonstrated for an antenna working at 5.11 GHz and then another design tuned to 2.45 GHz has been investigated. The gain and the Reactive Near Fields (RNF) of the second design is studied, showing a high decrease of the radiation toward the hand. Moreover, for the an-tenna with the Z element, the reduction in the magnetic RNF at distance 15 mm is almost 2 dB A/m compared to the antenna itself. 46 - Design of a near-broadside six-slot array antenna on a composite right/left-handed waveguide [Show abstract] María Navarro-Tapia, Departamento de Ingeniería de Comunicaciones, Universidad de Málaga, Spain Jaime Esteban, Departamento de Electromagnetismo y Teoría de Circuitos, Universidad Politécnica de Madrid, Spain Carlos Camacho-Peñalosa, Departamento de Ingeniería de Comunicaciones, Universidad de Málaga, Spain This contribution deals with the design problem of a slotted antenna when the feeding waveguide shows a composite right/left-handed behavior. The use of the well-known design procedure by Elliott is proposed. A near-broadside six-slot antenna has been designed, constructed and measured. Good agreement is found between numerical and experimental results. 47 - Single interface between a bulk metamaterial and a homogeneous half space [Show abstract] Jianji Yang, Institut d’Optique, France Christophe Sauvan, Institut d’Optique, France Philippe Lalanne, Institut d’Optique, France Thomas Paul, Institute of Solid State Theory and Condensed Matter Optics,Friedrich-Schiller-Universität Jena, Germany Carsten Rockstuhl, Institute of Solid State Theory and Condensed Matter Optics,Friedrich-Schiller-Universität Jena, Germany Falk Lederer, Institute of Solid State Theory and Condensed Matter Optics,Friedrich-Schiller-Universität Jena, Germany We propose a general method to compute the scattering coefficients between plane waves and Bloch modes at a single interface between a bulk metamaterial and a homogeneous half space. This calculation that involves near-field quantities attached to the fine structure of the metamaterial allows us to accurately test the validity of the single-Bloch mode approximation. It additionally provides a critical insight into the retrieved parameters that are obtained with classical methods by considering only far-field quantities of metamaterial slabs. 48 - Three dimensional fishnet structures by rolled-up metal/semiconductor microrolls [Show abstract] Markus Bröll, Universität Hamburg Institut für Angewandte Physik, Germany Stephan Schwaiger, Universität Hamburg Institut für Angewandte Physik, Germany Daniel Stickler, Universität Hamburg Institut für Angewandte Physik, Germany Federico Valmorra, Universität Hamburg Institut für Angewandte Physik, Germany Jens Ehlermann, Universität Hamburg Institut für Angewandte Physik, Germany Jochen Kerbst, Universität Hamburg Institut für Angewandte Physik, Germany Detlef Heitmann, Universität Hamburg Institut für Angewandte Physik, Germany Stefan Mendach, Universität Hamburg Institut für Angewandte Physik, Germany We demonstrate the realization of metal/semiconductor fishnet structures, which are ’drilled’ into the walls of multi-rotated metal/semiconductor microrolls. Using a three dimensional numerical solver for Maxwells equations we can show theoretically that these structures exhibit a negative refractive index in the near infrared regime. 49 - Miniaturized reconfigurable filters based on microstrip horizontal corrugations [Show abstract] Eva Rajo-Iglesias, University Carlos III of Madrid, Spain Oscar Quevedo-Teruel, University Carlos III of Madrid, Spain Luis Inclán-Sánchez, University Autonoma of Madrid, Spain In this communication we present the initial step to achieve reconfigurable corrugations. As unit cell we propose to use a planar horizontal microstrip corrugation based on hairpin resonators geometry, which is especially compact. This initial work evaluates the filtering properties of a single unit cell by loading a microstrip line. In order to obtain the desired reconfigurability, varactor diodes have been employed. These varactor diodes force to change the series capacitance of the unit cells, consequently, modifying the notched bands produced by the periodic structures. 50 - Harmonic suppression of 3G microstrip antennas using miniaturized negative-ε metamaterial resonatorsNo show, [Show abstract] Mohamed Fouad, Department of Electronic Engineering, MTC, Cairo, Egypt M. A. Abdalla, Department of Electronic Engineering, MTC, Cairo, Egypt H. A. Elregeily, Department of Electronic Engineering, MTC, Cairo, Egypt A. A. Mitkees, Department of Electronic Engineering, MTC, Cairo, Egypt A metamaterial microstrip patch antenna with harmonic suppression for 3G applications is introduced. The introduced antenna integrates a microstrip patch antenna with a complementary split ring resonator (CSRR). The antenna can suppress higher order harmonics using only one unit cell of CSRR for the size minimization purposes. A theoretical concept of the negative ε characteristics of the CSRR is introduced. A full wave electromagnetic simulation results are introduced which validates the theoretical concepts. The results il-lustrate that the proposed antenna operates at 1.8 GHz with return loss close to 15 dB. Within the frequency band up to 5 GHz, the higher order harmonics do not exceed 3.5 dB which represent 10 dB harmonic suppres-sion compared with conventional microstrip antennas.
11:20 - 13:00 - Parallel sessions Thursday 2
11:20 - Special session 12 Periodic and Nonperiodic Metamaterial Surfaces [Show abstract]
This special session will present recent advances in the design and analysis of metamaterial surfaces: subwavelength-structured surfaces possessing tailored electromagnetic properties. The talks will describe periodic and non-periodic metamaterial surface designs that operate at microwave, THz and optical frequencies. Various applications of metamaterial surfaces that include frequency filtering, shielding, switching, and focusing will be summarized.
Organizer(s): Anthony Grbic, Dept. of EECS,University of Michigan, Anguilla
11:20 - 11:40 - Tailoring and detecting optical superoscillations: a new superresolution paradigm Invited [Show abstract] Joerg Baumgartl, University of St Andrews, United Kingdom Michael Mazilu , University of St Andrews, United Kingdom Sebastian Kosemier, University of St Andrews, United Kingdom Kishan Dohlakia, University of St Andrews, United Kingdom Nadav Shapira, Technion - Israel Institute of Technology, Israel Alexander Szameit, Technion - Israel Institute of Technology, Israel Mordechai Segev, Technion - Israel Institute of Technology, Israel Edward Rogers, University of Southampton, United Kingdom Tsung Sheng Kao, University of Southampton, United Kingdom Vassili Savinov, University Of Southampton, United Kingdom Nikolay Zheludev, University of Southampton, United Kingdom The recently discovered phenomenon of superoscillation predicts that a properly designed diffraction grating structure can create sub-wavelength localisations of light that propagate several wavelengths away from the structure, into the far-field. This leads to the possibility of a new class of far-field optical imaging devices with better than diffraction limited resolution and provides an alternative to the well known Pendry-Veselago negative index super-lens. In this talk we will discuss how superoscillation can be used in imaging systems with sub-wavelength resolution. We will focus on the creation of controllable, sub-wavelength light structures using spatial light modulation and demonstrate the production of isolated sub-wavelength hotspots from binary amplitude masks and quasi periodic arrays of holes. We will also present a technique for experimentally measuring the local k-vector of a superoscillatory field, and hence measuring its degree of superoscillation. 11:40 - 12:00 - Metamaterial absorbers with wide-angle polarization-insensitive multiband properties for RF through mid-infrared applications Invited [Show abstract] Douglas Werner, The Pennsylvania State University, USA Zhi Hao Jiang, The Pennsylvania State University, USA Fatima Toor, The Pennsylvania State University, USA Seokho Yun, The Pennsylvania State University, USA Zikri Bayraktar, The Pennsylvania State University, USA Xiande Wang, The Pennsylvania State University, USA Theresa Mayer, The Pennsylvania State University, USA Pingjuan Werner, The Pennsylvania State University, USA In this paper, we will provide a brief overview of research in the area of metamaterial absorbers covering RF, THz and optical design approaches. Next, we will introduce a new design technique based on matched magneto-dielectric metamaterial absorbers for RF applications. Finally, we will present a flexible dual-band polarization-insensitive metamaterial absorber with a wide field of view (FOV) targeting for the first time the mid-IR band. The nano-scale structure was fabricated and characterized, showing excellent agreement between measured and simulated results. 12:00 - 12:20 - Planar metamaterial absorbers for precise control of infrared blackbody radiation Invited [Show abstract] Xianliang Liu, Boston College, USA Willie Padilla, Boston College, USA In this presentation I will describe the theory, fabrication, characterization, and performance of a planar metamaterial surface which emits tailored thermal radiation. I elaborate on the 12:20 - 12:40 - Generalized sheet transition condition model for a metafilm Invited [Show abstract] Edward Kuester, University of Colorado, USA Kendra Kumley, University of Colorado, USA Christopher Holloway, National Institute of Standards and Technology, USA In this paper, the consequences of randomizing a metafilm of spheres are examined. Good agreement is found between analytically calculated plane wave reflection coefficients and results of numerical simulations. It is found that only relatively small changes in the reflection coefficient occur for fairly strong deviations of the spheres. 12:40 - 13:00 - Experimental verification of two-dimensional subwavelength-focused imaging using a near-field probe Invited [Show abstract] Loïc Markley, University of Toronto, Canada George V. Eleftheriades, University of Toronto, Canada The experimental verification of subwavelength imaging using a near-field antenna array probe is presented in this paper. Two-dimensional imaging is achieved by using end-fire elements in the array and maintaining a high degree of symmetry in the design. The reflection coefficient is monitored as the probe is scanned to detect small field perturbations due to the presence of short dipole objects. The minimum resolvable separation between two objects placed a quarter wavelength away from the probe was determined in experiment to be 0.259 wavelengths.
11:20 - Session 12a Plasmonic Metamaterials 2
Session chairperson(s): Francisco J. Garcia-Vidal, Universidad Autonoma de Madrid, Spain, Francisco Medina, Universidad de Sevilla, Spain
11:20 - 11:40 - Increasing the optical activity and light absorption with metamaterials Invited [Show abstract] Sailing He, Joint Research Center of Photonics of the Royal Institute of Technology (Sweden) and Zhejiang University (China), China A bilayered chiral metamaterial is proposed to realize giant optical activity. By transmission through this thin bilayered structure of less than λ/30 thick, a linearly polarized wave is converted to its cross polarization with a resonant polarization conversion efficiency (PCE) of over 90%. Meanwhile, the axial ratio of the transmitted wave is better than 40 dB. The transversely isotropic property of this polarization rotator is also experimentally verified. Some metamaterials consists of nano-antenna array are also used to improve the light absorption properties. 11:40 - 12:00 - Structures for coupling surface plasmon-molecule interactions in vibrational resonance: A venue for chemical catalysis? Oral [Show abstract] Michael Miller, Southwest Research Institute, USA We describe a theoretical framework for the interaction between photon- and dipole excited surface plasmon polaritons (SPPs) and the vibrational wavefunctions of simple molecules, the intent of which is to demonstrate that such coupling leads to enhanced binding interactions of surface molecules and/or catalysis of chemical transformations. 12:00 - 12:20 - Model of resonant magnetism at optical frequencies based on effective rings of plasmonic bi-spheres Oral [Show abstract] Dmitry Morits, Aalto University, Finland Constantin Simovski, Aalto University, Finland In this presentation we suggest a design solution based on effective nanorings of bi-spheres (dimers) for creating the artificial magnetic response of nanostructured metamaterials in the optical frequency range. This design solution is a modification of the known effective rings formed by plasmonic nanospheres (located at the corners of a regular polygon). The utilization of bi-spheres allows us to provide a stronger robustness of the magnetic response to Ohmic loss in silver and, as a result, obtain the negative permeability at the edge between infrared and visible ranges. 12:20 - 12:40 - Ultrafast nanoplasmonics: from nanoantennas to microinterferometers Invited [Show abstract] Rudolf Bratschitsch, University of Konstanz, Germany We perform nonlinear emission measurements on single nanoantennas excited by few-cycle laser pulses. Micro-interferometers are used to reveal the ultrafast electron dynamics in gold. Finally, we present active magneto-plasmonic microinterferometry, where the surface plasmon wave vector in a gold–ferromagnet–gold trilayer is controlled using a weak external magnetic field. 12:40 - 13:00 - Surface plasmons in metallic nanostructures with gain Invited [Show abstract] Anatoly Zayats, The Queen's University of Belfast, United Kingdom We will discuss strategies for amplification of surface plasmon polariton waves propagating on the interface of metal and gain dielectric. Various amplifying configurations including hybrid plasmonic crystals will be considered. The applications of the gain-related effects in all-optical nanophotonics will be discussed.
11:20 - Session 12b Transformational Electromagnetics and Optics
Session chairperson(s): Che Ting Chan, Physics, HKUST, Hong Kong
11:20 - 11:40 - Non-birefringence and alternative transformation opticsWithdrawal, Oral [Show abstract] Luzi Bergamin, Aalto University, School of Science and Technology, Finland Alternative scenarios of transformation optics based on exact solutions different from the free space solution are analyzed. It is shown that the extended Fresnel equation provides a basis to identify media that retain the immediate geometric interpretation of transformation optics. As a result a mathematically sound basis for an extension of transformation optics to most non-birefringent and even some birefringent media is obtained. 11:40 - 12:00 - Optical analogue of the Robertson-Walker metric: Frequency conversion inside linear time-dependent metamaterials Oral [Show abstract] Vincent Ginis, Vrije Universiteit Brussel, Belgium Philippe Tassin, Iowa State University, United States of America Ben Craps, Vrije Universiteit Brussel, Belgium Irina Veretennicoff, Vrije Universiteit Brussel, Belgium In this contribution, we apply the framework of transformation optics to the Robertson-Walker metric of general relativity. We describe how a medium with controlled time-dependent material properties can change the optical frequency, even though it supports linear electromagnetic waves, and we demonstrate perfect redshifting or blueshifting of an electromagnetic wave without creation of sidebands. 12:00 - 12:20 - Transformation optics for design of quasi-optical elements Invited [Show abstract] David Smith, Duke University, USA Nathan Kundtz, Duke University, USA Transformation optical media are by nature complex, generally requiring anisotropic magnetic and electric response that must have precise spatial variation. Here, we describe the use of quasi-conformal transformations for use in refining optical and quasi-optical components. 12:20 - 12:40 - SOI waveguide adaptor made by transformation optics. Oral [Show abstract] Andre De Lustrac, IEF - University of Paris Sud 11, France Rasta Ghasemi, IEF - University of Paris Sud 11, France Paul-Henri Tichit, IEF - University of Paris Sud 11, France Aloyse Degiron, IEF - University of Paris Sud 11, France Boubacar Kanté, Nanoscale Science and Engineering Center, USA Anatole Lupu, IEF - University of Paris Sud 11, France Metamaterials have recently revealed their ability to control light at deep subwavelength scale. Taking profit of the recently proposed transformation optics, we numerically present in this paper a wave-guide adaptor capable of squeezing light from one waveguide to another. The taper is designed by tailoring the material parameters of a metamaterials layer deposited on the top of a SOI waveguide and thus reveals the ability of metamaterials to manipulate guided waves. 12:40 - 13:00 - Transformation-optical cavities Oral [Show abstract] Vincent Ginis, Vrije Universiteit Brussel, Belgium Philippe Tassin, Iowa State University, United States of America Costas M. Soukoulis, Iowa State University, United States of America Irina Veretennicoff, Vrije Universiteit Brussel, Belgium It is generally admitted that it is impossible to store light in a volume with subwavelength dimensions due to the wavelike nature of light. In this contribution, we design optical cavities within the framework of transformation optics. We overcome the fundamental diffraction limit and demonstrate the existence of cavities with subwavelength eigenmodes.
14:30 - 16:10 - Parallel sessions Thursday 3
14:30 - Special session 13 Metamaterial Engineered Antennas [Show abstract]
The application of metamaterial constructs to improve various properties of antenna systems has proven to be very successful in several different frequency regimes. Progress to achieve multi-frequency and multi-functional designs with different types of passive and active metamaterial elements will be reviewed. Experimentally confirmed performance characteristics will be highlighted.
Organizer(s): Richard Ziolkowski, University of Arizona, USA
14:30 - 14:50 - Photovoltaic panel as metamaterial antenna radome for high-gain application Oral [Show abstract] Hung-Hsuan Lin, Industrial Technology Research Institute, Chutung, Hsinchu, Taiwan Ta-Chun Pu, Industrial Technology Research Institute, Chutung, Hsinchu, Taiwan Chun-Yih Wu, Industrial Technology Research Institute, Chutung, Hsinchu, Taiwan Jui-Hung Chen, Industrial Technology Research Institute, Chutung, Hsinchu, Taiwan In this work we present a novel planar high-gain antenna using a panel of photovoltaic (PV) cells as a metamaterial layer to achieve high antenna gain. A 10-Watt, 36-elements unmodified commercial photovoltaic panel is applied as a semi-transparent layer for lambda /2 Fabry-Pérot cavity. Unit-cell transmission characteristic is analyzed to determine the operation point. A proposed prototype, with dimensions 360 mm × 320 mm × 47 mm, achieves remarkable 18.3 dBi antenna gain at 3.66 GHz in our test chamber. The very combination of PV cell and antenna exhibits high fill-factor, high-gain, and simple construction characteristics and is potential for various kinds of applications. 14:50 - 15:10 - Multi-functional metamaterial-inspired antennas for mobile communications Invited [Show abstract] Simone Tricarico, University “Roma Tre”, Department of Applied Electronics, Italy Filiberto Bilotti, University “Roma Tre”, Department of Applied Electronics, Italy Lucio Vegni, University “Roma Tre”, Department of Applied Electronics, Italy In this contribution, we present the design of multi-functional antennas, exploiting the spatial filtering properties of artificial magnetic metamaterials (AMM). The radiating element is a regular half-wavelength electric dipole, whose radiation pattern is selectively reshaped, depending on the operating frequency, thus efficiently working in different operation modes. 15:10 - 15:30 - Metamaterial-inspired, multi-functional, electrically small, near-field resonant parasitic antennas Invited [Show abstract] Richard Ziolkowski, University of Arizona, USA Peng Jin, University of Arizona, USA Chia-Ching Lin, University of Arizona, USA Electrically small antennas continue to be a critical enabling technology for many wireless applications. The design, fabrication, and testing of a variety of metamaterial-inspired near-field resonant parasitic antenna systems have demonstrated that they can meet many of the performance demands for those applications, including high efficiency, broad bandwidth, and multi-functionality. The multi-functional designs and their operating characteristics will be reviewed. 15:30 - 15:50 - Reducing the mutual coupling in arrays of closely-spaced MTM-inspired antennas Invited [Show abstract] Jiang Zhu, University of Toronto, Canada George Eleftheriades, University of Toronto, Canada A simple approach for reducing the mutual coupling in two closely-spaced electrically small antennas is proposed based on the general idea of field cancelation. The antenna array consists of two metamaterial-inspired small printed monopole antennas. The mutual coupling is reduced by self-cancelation of the induced common ground and near-field currents, without introducing additional structures. A fabricated prototype of a two-element array with an edge-to-edge separation of wavelength/30.6, yields a simulated -17.6 dB mutual coupling of |S21| at the resonance of S11 , which is significantly better than the -8.8 dB level of the original array. Preliminary results for a 2by2 reduced mutual coupling array are also reported. 15:50 - 16:10 - Near zero refractive index (NRZI) metamaterials for feeding antenna arrays Invited [Show abstract] Daniel Segovia-Vargas, Universidad Carlos III de Madrid, Spain Fernando Iñigo-Villacorta, Universidad Carlos III de Madrid, Spain Javier Herraiz-Martínez, Universidad Carlos III de Madrid, Spain This paper presents the using of near zero refractive index materials for feeding antenna arrays and achieves the maximum directivity. Series structures are being used and comparison with conventional feeding structures is also presented.
14:30 - Session 13a Plasmonic Metamaterials 3
Session chairperson(s): Mark Brongersma , Stanford University, USA
14:30 - 14:50 - New non-plasmonic enhancement of light emitted by InGaN/GaN quantum wells Invited [Show abstract] Arkadii Krokhin, University of North Texas, USA Antony Llopis, University of North Texas, USA J. Lin, University of North Texas, USA Arup Neogi, University of North Texas, USA Sergio Periera, University of Aveiro, Portugal I. Watson, University of Strathclyde, UK We report a new non-resonant mechanism for emission enhancement in an InGaN/GaN quantum well with embedded gold nanospheres. Unlike well-known resonant enhancement due to sharp increase in the rate of spontaneous emission near plasmonic resonance, in our experiment the enhancement occurs at the frequency of the QW which is well above the resonance. We suggest that this non-resonant enhancement is due to the electrostatic interaction of the electron-hole pairs with gold nanospheres. 14:50 - 15:10 - Giant coupling of localized magnetic and electric plasmons to photonic microcavity modes Oral [Show abstract] Ralf Ameling, University of Stuttgart, Germany Harald Giessen, University of Stuttgart, Germany We demonstrate strong coupling of localized plasmon modes in cut-wire metamaterials to photonic modes of a microcavity. This results in large anticrossings of the electric (symmetric) and magnetic (antisymmetric) plasmon modes and the cavity mode dispersion. Our design allows especially the efficient excitation of magnetic dipoles. 15:10 - 15:30 - Plasmon optical nanoantennas: 3D characterization, design, and applications in metamaterials Oral [Show abstract] Jose A. Sánchez-Gil, Instituto de Estructura de la Materia (CSIC), Spain Ramon Paniagua-Dominguez, Instituto de Estructura de la Materia (Consejo Superior de Investigaciones Científicas), Spain Rogelio Rodriguez-Oliveros, Instituto de Estructura de la Materia (Consejo Superior de Investigaciones Científicas), Spain Vincenzo Giannini, Experimental Solid State Group, Physics Department, Imperial College, United Kingdom Demetrio Macías, Laboratoire de Nanotechnologie et d'Instrumentation Optique (ICD-LNIO), Université de Technologie de Troyes, France Jaime Gómez-Rivas, Institute-AMOLF, c/o Philips Research Laboratories, Eindhoven, Netherlands We investigate the electromagnetic properties of metal nanoparticles, in special plasmon resonances yielding large local fields or enhanced emission (dimer/trimer nanowires, nanoparticles of complex shape...) This is done on the basis of 2D electromagnetic calculations based on the Greens theorem surface integral equations. Recently, we have extended this surface integral equation formulation to account for 3D nanostructures of arbitrary shape. Furthermore, a method has been developed to design nanostructures at will, based on a bio-inspired stochastic algorithm to optimize configurations for a given electromagnetic property. All these methods are exploited to explore applications of plasmonic nanostructures as building blocks for metamaterials 15:30 - 15:50 - Surface plasmon polaritons on structured surfaces Invited [Show abstract] Alexei A. Maradudin, University of California, Irvine, USA Tamara A. Leskova, University of California, Irvine, USA Two properties of surface plasmon polaritons on suitably structured metallic surfaces are studied theoretically in this paper, namely transverse localization and a Wannier-Stark ladder. 15:50 - 16:10 - Solitons and guided waves in complex plasmonic metamaterials Invited [Show abstract] Allan Boardman, University of Salford, United Kingdom Peter Egan, University of Salford, United Kingdom Rhiannon Mitchell-Thomas, University of Salford, United Kingdom Yuriy Rapoport, University of Salford, United Kingdom Larry Velasco, University of Salford, United Kingdom The advent of metamaterials heralds the possibility of waveguide structures that can sustain both weakly and strongly guided electromagnetic waves. It will be shown that these can be used under a wide variety of condi-tions that point to the kind of data manipulation currently associated with slow waves and the complete stopping of light in complex structures.
14:30 - Session 13b Homogenization and Effective Medium Theories 2
14:30 - 14:50 - Ultrasonic velocities and heat capacity of opal matrices Oral [Show abstract] Anatoly Rinkevich, Institute of Metal Physics, Russia Dmitry Perov, Institute of Metal Physics, Russia Mikhail Samoilovich, Central Research Technological Institute “Technomash”, Russia Svetlana Klescheva, Central Research Technological Institute “Technomash”, Russia Elastic properties and heat capacity has been studied for opal matrix packages and 3D-nanocomposites based on opal matrices. Measurements of velocities and attenuation coefficients both longitudinal and transverse waves are carried out at room temperature. The Debye temperature is calculated via ultrasonic velocities. Temperature dependency of heat capacity is measured. It is shown that the low temperature part of dependency mostly con-sists of terms proportional to first and third temperature exponent. It is found that the values of Debye tempera-ture determined from ultrasound velocities and heat capacity differ essentially. 14:50 - 15:10 - Homogenization of metamaterials based on multipole approach Oral [Show abstract] Arkadi Chipouline, Friedrich-Schiller-Universität Jena, Germany Homogenization of optical metamaterials is one of the fundamental problems important from the scientific and methodological points of view. Here the homogenization approach using multipole expansion is analysed and compared with the phenomenological one. Connections between Serdyukov-Fedorov transformation and these two ways for homogenization are revealed. It is shown, that in the framework of the multipole approach the magnetization can appear without taking into account a retardation effect, giving rise for modelling of bi-anisotropic structures as well. 15:10 - 15:30 - Experimental evidence of anisotropic behaviour by photonic crystals in the homogenization limit Invited [Show abstract] Jose Sanchez-Dehesa, Universidad Politecnica de Valencia, Spain Jorge Carbonell, Universidad Politécnica de Valencia, Spain Francisco Cervera, Universidad Politecnica de Valencia, Spain Lyudmila Gumen, Universidad Popular Autónoma del Estado de Puebla, Mexico Jesús Arriaga, Instituto de Física, Universidad Autónoma de Puebla, Mexico Arkadii Krokhin, University of North Texas, USA This work reports an experimental demonstration of the anisotropy predicted for the effective dielectric constant of photonic crystals in the homogenization limit. Here, two-dimensional rectangular arrays of dielectric rods (Alumina or FR4) in air have been studied in the long-wavelength limit by means of a microwave measurement set up. 15:30 - 15:50 - Generalized Lorentz-Lorenz formula for randomly microstructured composites and artificial quasimagnetism problem Oral [Show abstract] Mikhail Barabanenkov, Institute of Microelectronics Technology Russian Academy of Science, Russia Yurii Barabanenkov, Institute of Radioengineering and Electronics, Russian Academy of Sciences, Russia We make homogenization of stochastic Maxwell’s equations for EM field in random composite consisting of statistical ensemble of non-magnetic particles by averaging over statistical ensemble. The technique of Dyson equation in wave multiple scattering theory is used. We derive a generalized Lorentz-Lorenz formula for effective dielectric permittivity described the ensemble averaged electromagnetic wave field propagation in random composite. 15:50 - 16:10 - Study of the toroidal-SRR: magnetic polarizability and scaling up to optical frequencies Oral [Show abstract] Juan Domingo Baena Doello, Department of Physics, Universidad Nacional de Colombia, Colombia J. A. Socarrás, Department of Physics, Universidad Nacional de Colombia, Colombia A type of Split Ring Resonator is proposed whose topology is just the same as the particle proposed several years before by Pendry, but now using a toroidal shape. Its magnetic excitation is studied via an equivalent circuit model. It might be scaled to molecular dimensions by using carbon nanotubes.
16:10 - 16:30 - Coffee break and poster session 3 (continuation)
16:30 - 18:10 - Parallel sessions Thursday 4
16:30 - Special session 14 European Projects on Fabrication of Metamaterial Nanostructures [Show abstract]
Within the frame of the FP7 NMP call on nanostructured metamaterials, the European Commission has selected four projects on relevant material science and technology. Projects MAGNONICS, METACHEM, and NANOGOLD will focus on selfassembly of metal and magnetic particles, and project NIM-NIL will develop graphene fabrication techniques by combining CVD methods and nanoimprint lithography. The projects will have impact on design and processing of novel materials expanding the existing range of electromagnetic properties. The main goal of this session is to present the potentials of the material science and technology approaches studied by these new projects to the broad community of researchers working on metamaterials.
Organizer(s): Philippe Barois, CNRS - Centre de Recherche Paul Pascal, France, Toralf Scharf, Ecole Polytechnique Fédérale de Lausanne, Institute of Microengineering, Switzerland, Iris Bergmair, PROFACTOR GmbH, Austria, Volodymyr Kruglyak, University of Exeter, United Kingdom
16:30 - 16:50 - EC FP7 NMP projects on metamaterials Keynote [Show abstract] Anne de Baas, European Commission, Research Directorate-General for Research and Technological Development, Belgium An EC-NMP Material S&T Call for the fabrication of nanostructured metamaterials resulted in four projects. A Coordination Support Action provides support on characterisation to the NMP field. The EC Programmes and a first impression of the projects will be presented. 16:50 - 17:10 - Self-organized bottom-up metamaterial based on spatially arranged nanoparticles: concepts and realizations Invited [Show abstract] Toralf Scharf, Ecole Polytechnique Fédérale de Lausanne, Switzerland Jose Dintinger, Ecole Polytechnique Fédérale de Lausanne, Switzerland Houda Sellame, Ecole Polytechnique Fédérale de Lausanne, Switzerland Georg Mehl, The University of Hull, United Kingdom Goran Ungar, University of Sheffield, United Kingdom Xiang Zeng, University of Sheffield, United Kingdom Carsten Rockstuhl, Friedrich-Schiller- Universität Jena, Germany Stefan Mühlig, Friedrich-Schiller- Universität Jena, Germany Thomas Bürgi, University of Heidelberg, Germany Alastair Cunningham, University of Heidelberg, Germany Luciano di Sio, University of Calabria, Italy Roberto Caputo, University of Calabria, Italy Vassilis Yannopapas, University of Patras, Greek Wolfgang Meier, Universtity of Basel, Switzerland D. de Bruyn Ouboter , Universtity of Basel, Switzerland Thomas Schuster, Universtity of Basel, Switzerland Metamaterial realization based on soft matter using organic materials and polymers incorporating resonant nanoparticles will be discussed. We present different concepts using self-organization that employ liquid crystals and polymers. Possible geometries of nanoparticle arrangements are proposed, different re-alizations are shown and achievable effective properties are discussed. Of particular interest are multilayer films with different particle densities and the formation of nanoassemblies useful to produce metaatoms with tailored electromagnetic scattering properties. 17:10 - 17:30 - Fabrication of metamaterials using graphene Invited [Show abstract] Maria Losurdo, Institute of Inorganic Methodologies and of Plasmas, Dept. of Chemistry - University of Bari, Italy Iris Bergmair, Functional Surfaces and Nanostructures, Profactor GmbH, Austria Rainer Schöftner, Functional Surfaces and Nanostructures, Profactor GmbH, Austria Rados Gajic, Institute of Physics, Solid state Physics and New Materials, Belgrade University, Serbia Goran Isic, Institute of Physics, Solid state Physics and New Materials, Belgrade University, Serbia Maria Kafesaki, Institute of Electronic Structure & Laser, Foundation for Research & Technology, Greece Costas M. Soukoulis, Institute of Electronic Structure & Laser, Foundation for Research & Technology, Greece Kurt Hingerl, Center for Surface and Nanoanalytics, Johannes Kepler University of Linz, Autria Giovanni Bruno, Institute of Inorganic Methodologies and of Plasmas, Dept. of Chemistry - University of Bari, Italy The EC project NIM_NIL targets the development of negative index materials (NIMs) operating in the optical regime with the lowest possible losses. The aim is to replace the metallic components for NIMs ultimately by graphene. This paper presents new manufacturing techniques for graphene like chemical vapor deposition and transformation of SiC to graphene in combination with Nanoimprint Lithography as structuring technique. 17:30 - 17:50 - Nanochemistry and self-assembly routes to metamaterials for visible light. European FP7 project METACHEM Invited [Show abstract] Philippe Barois, Université Bordeaux 1 - CNRS - Centre de Recherche Paul Pascal, France The objectives of the FP7 European collaborative project METACHEM are presented in paper. The general strategy is to use the extreme versatility of nano-chemistry to design and manufacture bulk meta-materials exhibiting non-conventional electromagnetic properties in the range of visible light. This spectral domain requires nano-scale patterns, typically around 50 nm in size or less. 17:50 - 18:10 - Protein-guided assembly of (magnetic) nanostructures Invited [Show abstract] Walther Schwarzacher, H. H. Wills Physics Laboratory, United Kingdom We will describe a new method for fabricating truly three-dimensional periodic arrays of nanoparticles. Our method is based on protein crystallization, is versatile, and of interest for its possible application to metama-terials. We use arrays of ferrimagnetic Fe oxide particles to illustrate the technique.
16:30 - Session 14a Three-Dimensional Metamaterials
Session chairperson(s): Filiberto Bilotti, University ROMA TRE, Italy
16:30 - 16:50 - Isotropic optical metamaterials Invited [Show abstract] Falk Lederer, University of Jena, Germany Carsten Rockstuhl, University of Jena, Germany Christoph Menzel, University of Jena, Germany Thomas Paul, University of Jena, Germany A. Andryieuski, Technical University Lyngby, Denmark R. Malureanu, Technical University Lyngby, Denmark A. Lavrinenko, Technical University Lyngby, Denmark Metamaterial imaging applications require optical isotropy. We show that highly symmetric unit cells do not necessarily exhibit this property. We prove that the dispersion relation can be tailored using a supercell metama-terial. Such metamaterial exhibits an isotropic negative index close to - 1. Its potential for image formation is discussed. 16:50 - 17:10 - From near-field to far-field coupling: Towards three-dimensional Bragg plasmonics Oral [Show abstract] Richard Taubert, 4th Physics Institute, University of Stuttgart, Germany Harald Giessen, 4th Physics Institute, University of Stuttgart, Germany We investigate coupling in three-dimensional nanowire structures. The vertical distance dependence of the optical properties is investigated systematically. In a structure consisting of multiple layers at Bragg distance, i.e., when the distance matches half the individual nanowire particle plasmon resonance wavelength, the resonant farfield coupling yields a plasmonic band gap spanning almost one octave. 17:10 - 17:30 - Electromagnetic and mechanical properties of meta-foils Oral [Show abstract] Herbert O. Moser, Singapore Synchrotron Light Source/National University of Singapore, Singapore Linke Jian, Singapore Synchrotron Light Source/National University of Singapore, Singapore Shenbaga Manogara Pandian Kalaiselvi, Singapore Synchrotron Light Source/National University of Singapore, Singapore Selven Virasawmy, Singapore Synchrotron Light Source/National University of Singapore, Singapore Agnieszka Banas, Singapore Synchrotron Light Source/National University of Singapore, Singapore Krzysztof Banas, Singapore Synchrotron Light Source/National University of Singapore, Singapore Sascha Pierre Heussler, Singapore Synchrotron Light Source/National University of Singapore, Singapore Wei Hua, Singapore Synchrotron Light Source/National University of Singapore, Singapore Yi Zhu, Singapore Synchrotron Light Source/National University of Singapore, Singapore Meta-foils are all-metal self-supported locally stiff and globally flexible space-grids exhibiting left-handed pass-bands in the range from sub-THz frequencies to the visible depending on geometric parameters. They may serve to implement cylindrical hyperlenses, transformation-optics-based antennas, and sensors under harsh operational conditions like elevated temperatures, humidity, corrosive environments, and radiation levels. 17:30 - 17:50 - Scattering properties of 3D metaatoms Oral [Show abstract] Christoph Menzel, Institute of Condensed Matter Theory and Solid State Optics, Friedrich-Schiller-Universität Jena, Germany Jörg Petschulat, Institute of Applied Physics, Friedrich-Schiller-Universität Jena, Germany Jianji Yang, Laboratoire Charles Fabry de l'Institut d'Optique, Université Paris-Sud, France Stefan Mühlig, Institute of Condensed Matter Theory and Solid State Optics, Friedrich-Schiller-Universität Jena, Germany Arkadi Chipouline, Institute of Applied Physics, Friedrich-Schiller-Universität Jena, Germany Carsten Rockstuhl, Institute of Condensed Matter Theory and Solid State Optics, Friedrich-Schiller-Universität Jena, Germany Philippe Lalanne, Laboratoire Charles Fabry de l'Institut d'Optique, Université Paris-Sud, France Thomas Pertsch, Institute of Applied Physics, Friedrich-Schiller-Universität Jena, Germany Falk Lederer, Institute of Condensed Matter Theory and Solid State Optics, Friedrich-Schiller-Universität Jena, Germany We analyze the spectrally resolved scattering properties of three-dimensional metaatoms forming a metamaterial by expanding their scattered field into multipole contributions. Several prototypical elements like the cut-wire pair, split rings in various illumination schemes and double-split-ring resonators are considered. It is quantitatively revealed that besides electric and magnetic dipoles, higher orders multipoles are excited to a significant extent. 17:50 - 18:10 - Artificial magnetism and transmission peaks in metamaterials made by pairs of planar conductors Invited [Show abstract] Filippo Capolino, Department of Electrical Engineering and Computer Science, University of California Irvine, USA Andrea Vallecchi, Department of Information Engineering, University of Siena, Italy Matteo Albani, Department of Information Engineering, University of Siena, Italy In this presentation we will show the relation between transmission peaks and artificial magnetism in metamaterials made by layers of paired dogbone-shaped planar conductors. In the literature, peaks of metamaterial transmission coefficients, which fall in the rejection band in connection with the superposition of an electric and a magnetic resonance (the latter responsible for the artificial magnetism), are usually associated to a negative index of refraction. This phenomenon is investigated in detail by deriving the analytical condition that corresponds to the transmission peak for a metamaterial consisting of pairs of dogbone-like conductors. We show that such a peak does not coincide with the magnetic resonance, but it is slightly shifted below or above it depending on the order of the electric and magnetic resonances.
16:30 - Session 14b Superlenses and Hyperlenses 2
Session chairperson(s): Alexandra Boltasseva, Technical University of Denmark, Denmark
16:30 - 16:50 - Two dimensional phononic crystal as superlens with variable depth of image plane Oral [Show abstract] Evgeny Vinogradov, General Physics Institute RAS, named by A.M. Prochorov, Russia We analyzed experimental conditions and the parameters of 2D phononic crystals media suitable for realization flat superlens with the negative refraction of sound waves. It was found possibility variation depth of superlens (best resolution ~ lambda/4) image plane in wide range by tuning frequency of radiation. 16:50 - 17:10 - Perfect lenses with positive refractive index Oral [Show abstract] Tomas Tyc, Institute of Theoretical Physics and Astrophysics, Masaryk University, Czech Republic Aaron Danner, Department of Electrical and Computer Engineering, National University of Singapore, Singapore Ulf Leonhardt, School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, UK We describe index profiles for perfect imaging with positive refraction different from Maxwell's fish eye. Numerical simulations show that these profiles do indeed transfer images with, in principle, unlimited resolution. Such profiles could overcome the fundamental limitations of perfect imaging with negative refraction and find practical applications in nanolithography. 17:10 - 17:30 - Planar far field superlens based on anisotropic left-handed metamaterials Invited [Show abstract] Maria Kafesaki, Foundation for Research and Technology Hellas, Greece Nian-Hai Shen, Foundation for Research and Technology Hellas , Greece Stavroula Foteinopoulou, Foundation for Research and Technology Hellas , Greece Costas Soukoulis, Iowa State University & Foundation for Research and Technology Hellas, USA In this presentation we will theoretically show that under specific conditions anisotropic metamaterial slabs can emulate Pendry's perfect lens phenomenon on a plane. A new lens formula is found for this special anisotropic metamaterial superlens, which allows significant shrinkage of the metamaterial slab thickness for a certain range of far-field operation. Conversely, such anisotropic metamaterial superlens with the same thickness as its isotropic analogue can operate for much larger distances between object and lens. 17:30 - 17:50 - Reflection imaging technique using a photonic crystal based flat lens Oral [Show abstract] Maxence Hofman, IEMN - University of Lille, France Olivier Vanbésien, IEMN - University of Lille, France Didier Lippens, IEMN - University of Lille, France A unity negative index flat lens based on photonic crystal technology is used for target detection and image reconstruction for an operation at 1.55 µm. Using numerical retrieval procedures, inspired from tomography, the ability to detect subwavelength-size targets and to image metallic objects of complex shapes is demonstrated numerically. 17:50 - 18:10 - Right-handed material as a superlens for visible light and audible sound Oral [Show abstract] Johan Christensen, IO - CSIC Madrid, Spain, Spain F. Javier García de Abajo, IO - CSIC Madrid, Spain, Spain We propose a new concept of a near-field lens capable of reliably imaging deep-subwavelength objects at a distance of several times the thickness of the lens. Nearly flat guided modes in a high-index dielectric slab are shown to propagate information of evanescent waves emanating from the imaged object, thus providing the degree of detail needed to map fine spatial variations. We show how this idea works for both electromagnetic and acoustic waves.
18:10 - 18:20 - Thursday evening break
18:20 - 18:40 - Closing ceremony