Pub Date : 2016-09-01DOI: 10.1109/METAMATERIALS.2016.7746428
M. Odit, P. Kapitanova, Y. Kivshar, P. Belov
Bianisotropic all-dielectric metasurfaces are demonstrated experimentally and their properties are studied in the microwave frequency range. Such metasurfaces are composed of dielectric particles with broken symmetry that exhibit different backscattering for the opposite excitation directions. An array of dielectric bianisotropic ceramic particles is fabricated and experimentally investigated for microwaves. The measured data demonstrate that the metasurface is characterized by different reflection phases when being excited from the opposite directions. At the frequency 6.7 GHz the metasurface provides a 2π phase change in the reflection spectrum with the amplitude close to 1.
{"title":"All-dielectric bianisotropic metasurfaces","authors":"M. Odit, P. Kapitanova, Y. Kivshar, P. Belov","doi":"10.1109/METAMATERIALS.2016.7746428","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2016.7746428","url":null,"abstract":"Bianisotropic all-dielectric metasurfaces are demonstrated experimentally and their properties are studied in the microwave frequency range. Such metasurfaces are composed of dielectric particles with broken symmetry that exhibit different backscattering for the opposite excitation directions. An array of dielectric bianisotropic ceramic particles is fabricated and experimentally investigated for microwaves. The measured data demonstrate that the metasurface is characterized by different reflection phases when being excited from the opposite directions. At the frequency 6.7 GHz the metasurface provides a 2π phase change in the reflection spectrum with the amplitude close to 1.","PeriodicalId":6587,"journal":{"name":"2016 10th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics (METAMATERIALS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76072504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-09-01DOI: 10.1109/METAMATERIALS.2016.7746382
A. Colombi, P. Roux, D. Colquitt, R. Craster, S. Guenneau
By combining concepts from elasticity, photonics and metamaterials, we present a seismic metasurface capable to convert or reflect seismic Rayleigh waves propagating in a sedimentary ground. The metasurface is obtained with an array of trees, with their height gradually decreasing to form a wedge-like profile, “the metawedge”. Local resonance phenomena between trees and ground, combined with the spatially varying profile of the wedge give rise to a twofold behavior depending on the incidence direction of the wavefront: (1) Rayleigh to shear wave conversion or (2) Rayleigh wave reflection.
{"title":"Conversion and reflection of Rayleigh waves with the seismic metawedge","authors":"A. Colombi, P. Roux, D. Colquitt, R. Craster, S. Guenneau","doi":"10.1109/METAMATERIALS.2016.7746382","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2016.7746382","url":null,"abstract":"By combining concepts from elasticity, photonics and metamaterials, we present a seismic metasurface capable to convert or reflect seismic Rayleigh waves propagating in a sedimentary ground. The metasurface is obtained with an array of trees, with their height gradually decreasing to form a wedge-like profile, “the metawedge”. Local resonance phenomena between trees and ground, combined with the spatially varying profile of the wedge give rise to a twofold behavior depending on the incidence direction of the wavefront: (1) Rayleigh to shear wave conversion or (2) Rayleigh wave reflection.","PeriodicalId":6587,"journal":{"name":"2016 10th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics (METAMATERIALS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78148561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-09-01DOI: 10.1109/METAMATERIALS.2016.7746431
M. Barbuto, F. Bilotti, A. Toscano
“Structured light” is an emerging research field aiming at obtaining unusual amplitude and phase distributions of an optical beam, with potential applications ranging from manipulation of microscopic particles to communications or imaging systems. Typically confined to optical frequencies, it has recently been extended to microwaves but limited to the generation of an electromagnetic field with orbital angular momentum. In this contribution, we extend the possibility of generating structured fields at microwave frequencies to the case of an electromagnetic field with a Möbius strip polarization state. In particular, by using the cavity model, we analytically show that the required phase and amplitude patterns can be obtained by superimposing the radiated fields generated by different modes of a patch antenna.
{"title":"Generating structured fields at microwave frequencies","authors":"M. Barbuto, F. Bilotti, A. Toscano","doi":"10.1109/METAMATERIALS.2016.7746431","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2016.7746431","url":null,"abstract":"“Structured light” is an emerging research field aiming at obtaining unusual amplitude and phase distributions of an optical beam, with potential applications ranging from manipulation of microscopic particles to communications or imaging systems. Typically confined to optical frequencies, it has recently been extended to microwaves but limited to the generation of an electromagnetic field with orbital angular momentum. In this contribution, we extend the possibility of generating structured fields at microwave frequencies to the case of an electromagnetic field with a Möbius strip polarization state. In particular, by using the cavity model, we analytically show that the required phase and amplitude patterns can be obtained by superimposing the radiated fields generated by different modes of a patch antenna.","PeriodicalId":6587,"journal":{"name":"2016 10th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics (METAMATERIALS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75362995","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-09-01DOI: 10.1109/METAMATERIALS.2016.7746494
S. Maslovski
Interaction of Gaussian light beams with a spherical metamaterial thermal black hole (which is a an object that outperforms the Planck-Kirchhoff black body in absorption of light with a given frequency) is considered. At a given wavelength, such an object, while being optically large, has an effective absorption cross section significantly greater than its physical cross section. The Poynting vector distribution in the vicinity of such object under a few excitation scenarios is studied. It is found that the energy flow picture in the region beneath the effective event horizon of the metamaterial thermal black hole is very peculiar, with the energy flow trajectories collapsing at a couple of impact points on the physical surface of the metamaterial thermal black hole.
{"title":"Light absorption and scattering by metamaterial thermal black hole","authors":"S. Maslovski","doi":"10.1109/METAMATERIALS.2016.7746494","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2016.7746494","url":null,"abstract":"Interaction of Gaussian light beams with a spherical metamaterial thermal black hole (which is a an object that outperforms the Planck-Kirchhoff black body in absorption of light with a given frequency) is considered. At a given wavelength, such an object, while being optically large, has an effective absorption cross section significantly greater than its physical cross section. The Poynting vector distribution in the vicinity of such object under a few excitation scenarios is studied. It is found that the energy flow picture in the region beneath the effective event horizon of the metamaterial thermal black hole is very peculiar, with the energy flow trajectories collapsing at a couple of impact points on the physical surface of the metamaterial thermal black hole.","PeriodicalId":6587,"journal":{"name":"2016 10th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics (METAMATERIALS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72603474","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-09-01DOI: 10.1109/METAMATERIALS.2016.7746426
D. Zuev, S. Makarov, V. Milichko, S. Starikov, I. Mukhin, I. Morozov, A. Krasnok, P. Belov
Unification of plasmonics and all-dielectric nanophotonics in one system offers advantages in terms of light manipulation at nanoscale. In this work we demonstrate a novel type of asymmetrical hybrid nanostructures fabricated via combination of conventional lithographical methods with fs laser reshaping at nanoscale. The method of such type structures fabrication makes possible accurate engineering both electric and magnetic optical resonances of the hybrid nanoparticle. We apply this approach to a hybrid metasurface, demonstrating tuning of scattering properties and considerable shift of the resonant transmittance spectral position on 250 nm in the visible range.
{"title":"Reconfigurable metal-dielectric nanodimers as component of hybrid nanophotonics","authors":"D. Zuev, S. Makarov, V. Milichko, S. Starikov, I. Mukhin, I. Morozov, A. Krasnok, P. Belov","doi":"10.1109/METAMATERIALS.2016.7746426","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2016.7746426","url":null,"abstract":"Unification of plasmonics and all-dielectric nanophotonics in one system offers advantages in terms of light manipulation at nanoscale. In this work we demonstrate a novel type of asymmetrical hybrid nanostructures fabricated via combination of conventional lithographical methods with fs laser reshaping at nanoscale. The method of such type structures fabrication makes possible accurate engineering both electric and magnetic optical resonances of the hybrid nanoparticle. We apply this approach to a hybrid metasurface, demonstrating tuning of scattering properties and considerable shift of the resonant transmittance spectral position on 250 nm in the visible range.","PeriodicalId":6587,"journal":{"name":"2016 10th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics (METAMATERIALS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76555622","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-09-01DOI: 10.1109/METAMATERIALS.2016.7746418
M. Hedayati, A. Yakovlev, M. Silveirinha, G. Hanson
A thickness dependent permittivity is derived in closed form for bounded wire-medium structures with electrically short wires. The model takes into account spatial dispersion (as an average per length of the wires) and the effect of the boundary. The thickness dependent permittivity is comprised of local bulk and boundary dependent terms, the latter including the effect of spatial nonlocality. The results are obtained for different electrically short wire-medium topologies which possess strong spatial dispersion, demonstrating good agreement with nonlocal homogenization model results.
{"title":"A local thickness dependent permittivity model for nonlocal bounded wire medium structures","authors":"M. Hedayati, A. Yakovlev, M. Silveirinha, G. Hanson","doi":"10.1109/METAMATERIALS.2016.7746418","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2016.7746418","url":null,"abstract":"A thickness dependent permittivity is derived in closed form for bounded wire-medium structures with electrically short wires. The model takes into account spatial dispersion (as an average per length of the wires) and the effect of the boundary. The thickness dependent permittivity is comprised of local bulk and boundary dependent terms, the latter including the effect of spatial nonlocality. The results are obtained for different electrically short wire-medium topologies which possess strong spatial dispersion, demonstrating good agreement with nonlocal homogenization model results.","PeriodicalId":6587,"journal":{"name":"2016 10th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics (METAMATERIALS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80075575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-09-01DOI: 10.1109/METAMATERIALS.2016.7746403
N. Tsitsas
Plane wave scattering by a dielectric slab on which has been etched an infinitely periodic metamaterial grating is analyzed by means of semi-analytical integral equation techniques. The grating slab's operation as a frequency filter as well as the effect of the grating's parameters on the diffracted fields are investigated for a grating composed of an epsilon-near-zero (ENZ) material.
{"title":"Efficient integral equation analysis of scattering by a metamaterial grating assisted slab","authors":"N. Tsitsas","doi":"10.1109/METAMATERIALS.2016.7746403","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2016.7746403","url":null,"abstract":"Plane wave scattering by a dielectric slab on which has been etched an infinitely periodic metamaterial grating is analyzed by means of semi-analytical integral equation techniques. The grating slab's operation as a frequency filter as well as the effect of the grating's parameters on the diffracted fields are investigated for a grating composed of an epsilon-near-zero (ENZ) material.","PeriodicalId":6587,"journal":{"name":"2016 10th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics (METAMATERIALS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83788471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-09-01DOI: 10.1109/METAMATERIALS.2016.7746423
A. Zhukov, M. Ipatov, V. Zhukova
We studied Giant magnetoimpedance (GMI) effect and magnetic properties of various Co-rich amorphous microwires. We measured magnetic field dependences of the GMI ratio up to GHz frequency range and observed quite high GMI ratio in studied thin magnetic microwires even at GHz frequencies. We observed different values of the magnetic anisotropy field obtained from the hysteresis loops and the impedance curves. Observed dependences can be explained considering different magnetic anisotropy in the surface layers and in the inner part of metallic nucleus and skin depth effect. Features of high frequency GMI effect have been analyzed using FMR-like approximation.
{"title":"Studies of Giant magnetoimpedance effect in soft magnetic microwires at GHz frequencies","authors":"A. Zhukov, M. Ipatov, V. Zhukova","doi":"10.1109/METAMATERIALS.2016.7746423","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2016.7746423","url":null,"abstract":"We studied Giant magnetoimpedance (GMI) effect and magnetic properties of various Co-rich amorphous microwires. We measured magnetic field dependences of the GMI ratio up to GHz frequency range and observed quite high GMI ratio in studied thin magnetic microwires even at GHz frequencies. We observed different values of the magnetic anisotropy field obtained from the hysteresis loops and the impedance curves. Observed dependences can be explained considering different magnetic anisotropy in the surface layers and in the inner part of metallic nucleus and skin depth effect. Features of high frequency GMI effect have been analyzed using FMR-like approximation.","PeriodicalId":6587,"journal":{"name":"2016 10th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics (METAMATERIALS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83058474","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-09-01DOI: 10.1109/METAMATERIALS.2016.7746422
Rensheng Xie, Jie Cao, Shouzheng Zhu
In this paper, a compact multi-band cylindrical dielectric resonator antenna (DRA) loaded with CSRR is presented. The DRA is composed of a semi-cylindrical dielectric resonator with metal ground sheet on the cut plane loaded with metamaterial structure. It is fed by aperture coupled microstrip line. The antenna size is about 50% decreased compared with the full cylindrical DRA. The SCRR is used to broaden bandwidth of the antenna. Simulation result shows that the antenna bandwidth can cover the 3G, 4G and WLAN usage. The antenna gain is above 5dB in its working band.
{"title":"A compact multi-band dielectric resonator antenna loaded with CSRRs for communication systems","authors":"Rensheng Xie, Jie Cao, Shouzheng Zhu","doi":"10.1109/METAMATERIALS.2016.7746422","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2016.7746422","url":null,"abstract":"In this paper, a compact multi-band cylindrical dielectric resonator antenna (DRA) loaded with CSRR is presented. The DRA is composed of a semi-cylindrical dielectric resonator with metal ground sheet on the cut plane loaded with metamaterial structure. It is fed by aperture coupled microstrip line. The antenna size is about 50% decreased compared with the full cylindrical DRA. The SCRR is used to broaden bandwidth of the antenna. Simulation result shows that the antenna bandwidth can cover the 3G, 4G and WLAN usage. The antenna gain is above 5dB in its working band.","PeriodicalId":6587,"journal":{"name":"2016 10th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics (METAMATERIALS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88706498","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-09-01DOI: 10.1109/METAMATERIALS.2016.7746521
D. Ramaccia, D. Sounas, A. Alú, A. Toscano, F. Bilotti
In this contribution, we present some important advancements in Doppler cloak technology, which is based on the frequency mixing property of linear momentum-biased metamaterial, whose artificial permittivity function is modulated in space and time. The importance of such a technology is given by the possibility to manipulate the Doppler effect and restore the invisibility of cloaked object in relativistic motion. Here, we review the main characteristics of a conventional Doppler cloak, consisting of a system composed of a planar reflector covered by a spatio-temporally modulated slab. We demonstrate that such a scheme presents some drawbacks in terms of efficiency and, therefore, an enhanced version based on a momentum-biased parallel-plate medium is presented and discussed.
{"title":"Advancements in Doppler cloak technology: Manipulation of Doppler Effect and invisibility for moving objects","authors":"D. Ramaccia, D. Sounas, A. Alú, A. Toscano, F. Bilotti","doi":"10.1109/METAMATERIALS.2016.7746521","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2016.7746521","url":null,"abstract":"In this contribution, we present some important advancements in Doppler cloak technology, which is based on the frequency mixing property of linear momentum-biased metamaterial, whose artificial permittivity function is modulated in space and time. The importance of such a technology is given by the possibility to manipulate the Doppler effect and restore the invisibility of cloaked object in relativistic motion. Here, we review the main characteristics of a conventional Doppler cloak, consisting of a system composed of a planar reflector covered by a spatio-temporally modulated slab. We demonstrate that such a scheme presents some drawbacks in terms of efficiency and, therefore, an enhanced version based on a momentum-biased parallel-plate medium is presented and discussed.","PeriodicalId":6587,"journal":{"name":"2016 10th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics (METAMATERIALS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84905222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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