Pub Date : 2016-09-01DOI: 10.1109/METAMATERIALS.2016.7746477
L. Prokopeva, A. Kildishev
We extend our previously developed theory of a circular omnidirectional absorber - `an optical black hole'. We introduce a new, elliptically flattened design that could have elliptic cylinder, oblate or prolate spheroidal shapes. As a result, the absorbing core could now be flattened to a strip (elliptic cylinder) or a disk (oblate spheroid) and therefore match well-established planar fabrication techniques. First, we present a general and complete theoretical description that includes 3D oblique incidence, and then test the theory with ray-tracing and full-wave simulations of elliptic absorbers that confirm flawless performance at complete acceptance angles.
{"title":"Omnidirectional light concentrators and absorbers revisited: Almost flat absorbers inside almost circular (spherical) lenses","authors":"L. Prokopeva, A. Kildishev","doi":"10.1109/METAMATERIALS.2016.7746477","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2016.7746477","url":null,"abstract":"We extend our previously developed theory of a circular omnidirectional absorber - `an optical black hole'. We introduce a new, elliptically flattened design that could have elliptic cylinder, oblate or prolate spheroidal shapes. As a result, the absorbing core could now be flattened to a strip (elliptic cylinder) or a disk (oblate spheroid) and therefore match well-established planar fabrication techniques. First, we present a general and complete theoretical description that includes 3D oblique incidence, and then test the theory with ray-tracing and full-wave simulations of elliptic absorbers that confirm flawless performance at complete acceptance angles.","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":"84191627","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.2016.7746467
K. Achouri, C. Caloz
A metasurface routing electromagnetic beams via surface waves from one point to another point of space is introduced. This metasurface is transparent and may simultaneously support generalized refraction for another orthogonal beam (birefringence). The metasurface is designed by the general surface susceptibility synthesis method and its operation is validated by finite difference analysis, both being based on generalized sheet boundary conditions.
{"title":"SurfaceWave routing of beams by a transparent birefringent metasurface","authors":"K. Achouri, C. Caloz","doi":"10.1109/METAMATERIALS.2016.7746467","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2016.7746467","url":null,"abstract":"A metasurface routing electromagnetic beams via surface waves from one point to another point of space is introduced. This metasurface is transparent and may simultaneously support generalized refraction for another orthogonal beam (birefringence). The metasurface is designed by the general surface susceptibility synthesis method and its operation is validated by finite difference analysis, both being based on generalized sheet boundary conditions.","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":"84271875","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.2016.7746377
D. Ramaccia, S. Arcieri, A. Toscano, F. Bilotti
In this contribution, we present a non-conventional core-shell nanoparticle, named supersphere, for implementing optical devices whose performances cannot be easily achieved with conventional nanoparticles. Superspheres are solids with intermediate shape between a sphere and a cube, whose external boundaries are described by Lamè surface equation. Thanks to its particular shape, a core-shell supersphere resonates at a lower resonant frequency with respect to a conventional core-shell spherical nanoparticle with same electrical dimensions. Such a characteristic allows relaxing the fabrication constrains, i.e. extremely thin shells, typically required for making the conventional spherical core-shell nanoparticles to operate in the lowest region of the visible spectrum. Here, after having discussed the geometry and electrical response of a core-shell supersphere, we report some preliminary results on their successful employment in the implementation of three optical devices: a trasparent screen, a biosensor and a mantle cloak.
{"title":"Super-spherical core-shell nanoparticles: Nanostructured materials enabling applications in the visible regime","authors":"D. Ramaccia, S. Arcieri, A. Toscano, F. Bilotti","doi":"10.1109/METAMATERIALS.2016.7746377","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2016.7746377","url":null,"abstract":"In this contribution, we present a non-conventional core-shell nanoparticle, named supersphere, for implementing optical devices whose performances cannot be easily achieved with conventional nanoparticles. Superspheres are solids with intermediate shape between a sphere and a cube, whose external boundaries are described by Lamè surface equation. Thanks to its particular shape, a core-shell supersphere resonates at a lower resonant frequency with respect to a conventional core-shell spherical nanoparticle with same electrical dimensions. Such a characteristic allows relaxing the fabrication constrains, i.e. extremely thin shells, typically required for making the conventional spherical core-shell nanoparticles to operate in the lowest region of the visible spectrum. Here, after having discussed the geometry and electrical response of a core-shell supersphere, we report some preliminary results on their successful employment in the implementation of three optical devices: a trasparent screen, a biosensor and a mantle cloak.","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":"85122529","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.2016.7746497
A. Miroshnichenko
The possibility of the existence of non-radiating sources has attracted the attention of physicists for many years in different branches of science. One the of the intriguing examples is the so-called anapole moment proposed by Zel'dovich in connection with the radiation-less properties of a toroid solenoid. Furthermore, such electromagnetic configurations were recently suggested to classically describe the nature of dark matter. Recently, we demonstrated that one of the simplest allowing for direct observation of anapole mode in the visible is high-refractive index sub-wavelength nanoparticles. They provide new ways for excitation and investigation of the electro-magnetic properties of such nontrivial excitations.
{"title":"Observation of anapole with dielectric nanoparticles","authors":"A. Miroshnichenko","doi":"10.1109/METAMATERIALS.2016.7746497","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2016.7746497","url":null,"abstract":"The possibility of the existence of non-radiating sources has attracted the attention of physicists for many years in different branches of science. One the of the intriguing examples is the so-called anapole moment proposed by Zel'dovich in connection with the radiation-less properties of a toroid solenoid. Furthermore, such electromagnetic configurations were recently suggested to classically describe the nature of dark matter. Recently, we demonstrated that one of the simplest allowing for direct observation of anapole mode in the visible is high-refractive index sub-wavelength nanoparticles. They provide new ways for excitation and investigation of the electro-magnetic properties of such nontrivial excitations.","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":"90293456","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.2016.7746464
J. Hu, J. Chen
The local affine transformation based method has been applied to the controlling of the flexural waves in plates and the isotropic transformation material properties are analytically derived in the conformal transformation mappings. A flexural waves beam bender is designed as a sample and the numerical simulations verify that it can control the wave propagation direction well in the plates.
{"title":"Isotropic transformation materials for the controlling of flexural waves in plates","authors":"J. Hu, J. Chen","doi":"10.1109/METAMATERIALS.2016.7746464","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2016.7746464","url":null,"abstract":"The local affine transformation based method has been applied to the controlling of the flexural waves in plates and the isotropic transformation material properties are analytically derived in the conformal transformation mappings. A flexural waves beam bender is designed as a sample and the numerical simulations verify that it can control the wave propagation direction well in the plates.","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":"91416699","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.2016.7746520
J. Preibisch, C. Schuster
The Contour Integral Method (CIM) is a numerically efficient modeling technique for planar or infinitely extended two-dimensional (2-D) structures. In the optical regime, the CIM has already been adapted and applied for the modeling of TM0z-mode scattering in photonic crystals. In this work the dual case of TE0z-mode scattering is addressed. Making use of the duality principle, expressions for the behavior of the TE0z-mode can be derived from the system matrices associated with the TE0z-mode. This allows to reuse use formulas and program code written for the TE0z-mode with minimal adjustments. The results are validated by comparison to full-wave simulations.
{"title":"Extension of the Contour Integral Method for the modeling of TE scattering in two-dimensional photonic structures using the duality principle","authors":"J. Preibisch, C. Schuster","doi":"10.1109/METAMATERIALS.2016.7746520","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2016.7746520","url":null,"abstract":"The Contour Integral Method (CIM) is a numerically efficient modeling technique for planar or infinitely extended two-dimensional (2-D) structures. In the optical regime, the CIM has already been adapted and applied for the modeling of TM<sub>0</sub><sup>z</sup>-mode scattering in photonic crystals. In this work the dual case of TE<sub>0</sub><sup>z</sup>-mode scattering is addressed. Making use of the duality principle, expressions for the behavior of the TE<sub>0</sub><sup>z</sup>-mode can be derived from the system matrices associated with the TE<sub>0</sub><sup>z</sup>-mode. This allows to reuse use formulas and program code written for the TE<sub>0</sub><sup>z</sup>-mode with minimal adjustments. The results are validated by comparison to full-wave simulations.","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":"90866262","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.2016.7746378
J. Ran, Yewen Zhang, Xiao-dong Chen, K. Fang, Hong Chen
This paper presents our observation of the abnormal Doppler effect inside a reconfigurable balanced transmission line, which has zero index at the balanced frequency. By applying a digital signal controller, a moving reflective interface is built inside this transmission line. The normal, inverse and zero Doppler effects are observed at different frequencies, which gives a completed picture of Doppler effect in metamaterials.
{"title":"Doppler effect in zero-index metamaterials","authors":"J. Ran, Yewen Zhang, Xiao-dong Chen, K. Fang, Hong Chen","doi":"10.1109/METAMATERIALS.2016.7746378","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2016.7746378","url":null,"abstract":"This paper presents our observation of the abnormal Doppler effect inside a reconfigurable balanced transmission line, which has zero index at the balanced frequency. By applying a digital signal controller, a moving reflective interface is built inside this transmission line. The normal, inverse and zero Doppler effects are observed at different frequencies, which gives a completed picture of Doppler effect in metamaterials.","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":"91000765","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.2016.7746408
A. Vallecchi, S. Chu, C. Stevens, E. Shamonina
We have studied analytically, numerically and experimentally the effect of conducting material upon the mutual inductance between two coils yielding thereby the attenuation of magnetoinductive (MI) waves. It is shown among others that the expression for plane wave attenuation, used in the literature, has only limited validity. Our results will be relevant for the design and optimisation of MI waveguide links in conducting media in general and particularly when the attenuation is caused by soil conductivity. The results will also help medical diagnosis in problems where parts of the human body are imaged.
{"title":"Impact of a conducting medium on the coupling of meta-atoms","authors":"A. Vallecchi, S. Chu, C. Stevens, E. Shamonina","doi":"10.1109/METAMATERIALS.2016.7746408","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2016.7746408","url":null,"abstract":"We have studied analytically, numerically and experimentally the effect of conducting material upon the mutual inductance between two coils yielding thereby the attenuation of magnetoinductive (MI) waves. It is shown among others that the expression for plane wave attenuation, used in the literature, has only limited validity. Our results will be relevant for the design and optimisation of MI waveguide links in conducting media in general and particularly when the attenuation is caused by soil conductivity. The results will also help medical diagnosis in problems where parts of the human body are imaged.","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":"80998618","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.2016.7746447
N. Chamanara, Yousef Vahabzadeh, K. Achouri, C. Caloz
The generalized sheet transition conditions (GSTCs) have been recently leveraged for synthesizing metasurfaces transforming specified monochromatic incident waves in arbitrary fashions. This paper extends the technique to general polychromatic designs. The resulting polychromatic metasurfaces provide unprecedented control on the temporal and spatial frequency components of incident pulsed electromagnetic waves. They may find applications in spatial filters, spatial phasers, real-time Fourier transformers and real-time spectrum analyzers.
{"title":"Exact polychromatic metasurface design: The GSTC approach","authors":"N. Chamanara, Yousef Vahabzadeh, K. Achouri, C. Caloz","doi":"10.1109/METAMATERIALS.2016.7746447","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2016.7746447","url":null,"abstract":"The generalized sheet transition conditions (GSTCs) have been recently leveraged for synthesizing metasurfaces transforming specified monochromatic incident waves in arbitrary fashions. This paper extends the technique to general polychromatic designs. The resulting polychromatic metasurfaces provide unprecedented control on the temporal and spatial frequency components of incident pulsed electromagnetic waves. They may find applications in spatial filters, spatial phasers, real-time Fourier transformers and real-time spectrum analyzers.","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":"84019377","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.2016.7746491
M. Lobet, M. Sarrazin
Electrodynamics of graphene-PMMA heterostructures on a slab of epsilon-near-zero metamaterial is theoretically worked out. Perfect absorption is achieved once electromagnetic impedance matching condition is fullfilled. Tunability of the absorption can be obtained using a voltage modulation of the effective conductivity of the device. For example, modulation of 40% of absorption/reflectance is shown using voltage beyond the breakdown voltage of the polymer layers.
{"title":"Tunable microwave absorption of graphene-polymer heterostructures deposited on a epsilon-near-zero metamaterial","authors":"M. Lobet, M. Sarrazin","doi":"10.1109/METAMATERIALS.2016.7746491","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2016.7746491","url":null,"abstract":"Electrodynamics of graphene-PMMA heterostructures on a slab of epsilon-near-zero metamaterial is theoretically worked out. Perfect absorption is achieved once electromagnetic impedance matching condition is fullfilled. Tunability of the absorption can be obtained using a voltage modulation of the effective conductivity of the device. For example, modulation of 40% of absorption/reflectance is shown using voltage beyond the breakdown voltage of the polymer layers.","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":"73036408","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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