Pub Date : 2016-09-01DOI: 10.1109/METAMATERIALS.2016.7746517
P. Petrov, A. Radkovskaya, E. Shamonina
Electromagnetic properties of metamaterials are strongly affected by inter-element coupling between meta-atoms. Our recently proposed method enabling a retrieval of coupling coefficients in metamaterials is based on a transformation of the frequency dependence of complex current amplitudes in interacting meta-atoms, enabling separate deduction of the magnetic and electric coupling coefficients. This method relies on our ability to measure separately currents on two interacting elements. However, in case of dense metamaterials fields from the surroundings mask the required signals severely. In this paper we present a novel technique of coupling retrieval for dense metamaterials, in which spurious fields from environment are accounted for by correction factors. The method is verified on a number of examples using both experimental and simulation data in a wide frequency range from MHz to THz. Our method will serve as a basis for design of densely packed metamaterials with strong inter-element coupling.
{"title":"Retrieval of coupling coefficients for dense metamaterials","authors":"P. Petrov, A. Radkovskaya, E. Shamonina","doi":"10.1109/METAMATERIALS.2016.7746517","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2016.7746517","url":null,"abstract":"Electromagnetic properties of metamaterials are strongly affected by inter-element coupling between meta-atoms. Our recently proposed method enabling a retrieval of coupling coefficients in metamaterials is based on a transformation of the frequency dependence of complex current amplitudes in interacting meta-atoms, enabling separate deduction of the magnetic and electric coupling coefficients. This method relies on our ability to measure separately currents on two interacting elements. However, in case of dense metamaterials fields from the surroundings mask the required signals severely. In this paper we present a novel technique of coupling retrieval for dense metamaterials, in which spurious fields from environment are accounted for by correction factors. The method is verified on a number of examples using both experimental and simulation data in a wide frequency range from MHz to THz. Our method will serve as a basis for design of densely packed metamaterials with strong inter-element coupling.","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":"88046494","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.2016.7746462
S. Hrabar, A. Kiricenko
It is shown that inherent instability of the non-Foster reactance (usually considered as a serious drawback of broadband active metamaterials) becomes a very useful feature in the case of self-oscillating radiating structures. Briefly, if a negative resistance is added to a non-Foster reactance, the whole circuit behaves as Thevenin's source (an oscillator) that can be perfectly matched. Such a system delivers maximal power to ordinary passive load (for instance to an antenna), within a very broad (theoretically infinite) bandwidth.
{"title":"Towards broadband tunable non-Foster radiating systems","authors":"S. Hrabar, A. Kiricenko","doi":"10.1109/METAMATERIALS.2016.7746462","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2016.7746462","url":null,"abstract":"It is shown that inherent instability of the non-Foster reactance (usually considered as a serious drawback of broadband active metamaterials) becomes a very useful feature in the case of self-oscillating radiating structures. Briefly, if a negative resistance is added to a non-Foster reactance, the whole circuit behaves as Thevenin's source (an oscillator) that can be perfectly matched. Such a system delivers maximal power to ordinary passive load (for instance to an antenna), within a very broad (theoretically infinite) bandwidth.","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":"84528917","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.2016.7746465
T. Iida, M. Kashiwagi
We present an extension of 3 dimensional (3D) water wave cloaking for ocean waves. By noting the equivalence between the 2D water (shallow water) wave problem and the 3D (deep water) problem, a 2D cloaking method based on the variable exchange is extended to free surface gravity waves in the ocean. It is shown that fluid density should have anisotropy so as to cloak an offshore structure. Numerical computations are confirmed by COMSOL Multiphysics.
{"title":"Cloaking of ocean waves with anisotropic fluid","authors":"T. Iida, M. Kashiwagi","doi":"10.1109/METAMATERIALS.2016.7746465","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2016.7746465","url":null,"abstract":"We present an extension of 3 dimensional (3D) water wave cloaking for ocean waves. By noting the equivalence between the 2D water (shallow water) wave problem and the 3D (deep water) problem, a 2D cloaking method based on the variable exchange is extended to free surface gravity waves in the ocean. It is shown that fluid density should have anisotropy so as to cloak an offshore structure. Numerical computations are confirmed by COMSOL Multiphysics.","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":"79719663","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.2016.7746508
O. Ozgun, M. Kuzuoglu
The transformation electromagnetics is applied to the modeling of electromagnetic scattering from periodic structures in conjunction with the finite element method with periodic boundary conditions. In a unit cell of periodic structure, a uniform mesh is used over a flat surface and the arbitrary periodic surface is modeled by a coordinate transformation. The major advantage of this approach is that arbitrary geometries can be handled by using a single and simple mesh. Therefore, repeated computations (such as in Monte Carlo simulations or optimization methods) corresponding to different geometries can be performed easily. Some numerical examples are demonstrated involving singly periodic structures.
{"title":"Numerical modeling of electromagnetic scattering from periodic structures by transformation electromagnetics","authors":"O. Ozgun, M. Kuzuoglu","doi":"10.1109/METAMATERIALS.2016.7746508","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2016.7746508","url":null,"abstract":"The transformation electromagnetics is applied to the modeling of electromagnetic scattering from periodic structures in conjunction with the finite element method with periodic boundary conditions. In a unit cell of periodic structure, a uniform mesh is used over a flat surface and the arbitrary periodic surface is modeled by a coordinate transformation. The major advantage of this approach is that arbitrary geometries can be handled by using a single and simple mesh. Therefore, repeated computations (such as in Monte Carlo simulations or optimization methods) corresponding to different geometries can be performed easily. Some numerical examples are demonstrated involving singly periodic structures.","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":"79732823","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.2016.7746487
Nick Lazarides, Z. Ivić, G. Tsironis
Superconducting quantum bits (qubits) are at the heart of quantum information processing schemes since they satisfy the requirements for being the building blocks of viable quantum computers. Here it is shown that quantum coherence, in the form of population inversion pulses, is induced by self-induced transparent electromagnetic pulses propagating in a quantum metamaterial comprising superconducting charge qubits. The experimental confirmation of that effect may open a new pathway to potentially powerful quantum computing.
{"title":"Quantum coherence in a qubit chain induced by electromagnetic pulses","authors":"Nick Lazarides, Z. Ivić, G. Tsironis","doi":"10.1109/METAMATERIALS.2016.7746487","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2016.7746487","url":null,"abstract":"Superconducting quantum bits (qubits) are at the heart of quantum information processing schemes since they satisfy the requirements for being the building blocks of viable quantum computers. Here it is shown that quantum coherence, in the form of population inversion pulses, is induced by self-induced transparent electromagnetic pulses propagating in a quantum metamaterial comprising superconducting charge qubits. The experimental confirmation of that effect may open a new pathway to potentially powerful quantum computing.","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":"79011743","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.2016.7746500
S. Amanatiadis, C. Liaskos, M. Kafesaki, N. Kantartzis
The extension of the perfectly matched layer (PML) for the effective absorption of propagating graphene surface waves in finite-difference time-domain (FDTD) schemes is developed in this paper. Graphene is accurately modelled through its surface conductivity and is imported in the FDTD algorithm as a surface boundary condition. Also, the conventional PML equations are properly modified to include graphene's contribution. The validity of the proposed technique is numerically investigated in order to prove its noteworthy performance.
{"title":"Modified perfectly matched layers in finite-difference time-domain schemes for the efficient truncation of propagating graphene surface waves","authors":"S. Amanatiadis, C. Liaskos, M. Kafesaki, N. Kantartzis","doi":"10.1109/METAMATERIALS.2016.7746500","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2016.7746500","url":null,"abstract":"The extension of the perfectly matched layer (PML) for the effective absorption of propagating graphene surface waves in finite-difference time-domain (FDTD) schemes is developed in this paper. Graphene is accurately modelled through its surface conductivity and is imported in the FDTD algorithm as a surface boundary condition. Also, the conventional PML equations are properly modified to include graphene's contribution. The validity of the proposed technique is numerically investigated in order to prove its noteworthy performance.","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":"80248322","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.2016.7746414
Haibing Xu, S. Bie, Jianjun Jiang
In this letter, we report the fabrication, and measurement of an ultra-broadband polarization-insensitive metamaterial absorber (MA), consisting of three layers. The EW and flaky carbonyl iron powders were used to produce two kinds of silicone rubber matrix magnetic composites for the top and the bottom layer, respectively. The middle layer is frequency selective surface (FSS) in the form of single square loop. The results show that the proposed 2.0 mm thick RAM can provide a 10 -dB reflectivity over the frequency range of 5.35-18 GHz and exhibit polarization-insensitive properties over the whole range of 2-18 GHz. Experimental results were in good agreement with simulated ones.
{"title":"Ultra-broadband and polarization-insensitive metamaterial absorber based on frequency selective surface","authors":"Haibing Xu, S. Bie, Jianjun Jiang","doi":"10.1109/METAMATERIALS.2016.7746414","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2016.7746414","url":null,"abstract":"In this letter, we report the fabrication, and measurement of an ultra-broadband polarization-insensitive metamaterial absorber (MA), consisting of three layers. The EW and flaky carbonyl iron powders were used to produce two kinds of silicone rubber matrix magnetic composites for the top and the bottom layer, respectively. The middle layer is frequency selective surface (FSS) in the form of single square loop. The results show that the proposed 2.0 mm thick RAM can provide a 10 -dB reflectivity over the frequency range of 5.35-18 GHz and exhibit polarization-insensitive properties over the whole range of 2-18 GHz. Experimental results were in good agreement with simulated ones.","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":"80307878","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.2016.7746453
K. Fang, Hong-Xin Chen, Yunhui Li, Junfei Zhao, Quan Wang, Yewen Zhang
The designing of the two-dimensional extremely subwavelength epsilon-negative metamaterials is presented at radio frequencies. The operation of the proposed components originates from the resonance of a dual-layer metamaterial of inclusions excited by an alternating electric field. The real part of permittivity should be assuming negative values in the artificial materials from 11.1MHz to 14MHz. To validate the formulation results, the measurement of epsilon is also accomplished.
{"title":"Designing of extremely subwavelength epsilon-negative metamaterials","authors":"K. Fang, Hong-Xin Chen, Yunhui Li, Junfei Zhao, Quan Wang, Yewen Zhang","doi":"10.1109/METAMATERIALS.2016.7746453","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2016.7746453","url":null,"abstract":"The designing of the two-dimensional extremely subwavelength epsilon-negative metamaterials is presented at radio frequencies. The operation of the proposed components originates from the resonance of a dual-layer metamaterial of inclusions excited by an alternating electric field. The real part of permittivity should be assuming negative values in the artificial materials from 11.1MHz to 14MHz. To validate the formulation results, the measurement of epsilon is also accomplished.","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":"76089845","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.2016.7746376
M. E. Aryaee Panah, L. Ottaviano, E. Semenova, A. Lavrinenko
Silicon doped InP is grown by metal-organic vapor phase epitaxy (MOVPE) using optimized growth parameters to achieve high free carrier concentration. Reflectance of the grown sample in mid-IR range is measured using FTIR and the result is used to retrieve the parameters of the dielectric function. The derived dielectric function is used to simulate the excitation of surface plasmons by a diffraction grating made of the grown material. The grating structure is fabricated using standard nanofabrication techniques. Spectral features from the grating agree well with the simulations and show spp coupling at predicted angles of incidence and wavelengths.
{"title":"Surface plasmons on highly doped InP","authors":"M. E. Aryaee Panah, L. Ottaviano, E. Semenova, A. Lavrinenko","doi":"10.1109/METAMATERIALS.2016.7746376","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2016.7746376","url":null,"abstract":"Silicon doped InP is grown by metal-organic vapor phase epitaxy (MOVPE) using optimized growth parameters to achieve high free carrier concentration. Reflectance of the grown sample in mid-IR range is measured using FTIR and the result is used to retrieve the parameters of the dielectric function. The derived dielectric function is used to simulate the excitation of surface plasmons by a diffraction grating made of the grown material. The grating structure is fabricated using standard nanofabrication techniques. Spectral features from the grating agree well with the simulations and show spp coupling at predicted angles of incidence and wavelengths.","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":"73934397","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.2016.7746410
S. Vellucci, A. Monti, G. Oliveri, A. Massa, A. Toscano, F. Bilotti
In this contribution, we propose the use of metasurfaces not only to cloak an object but also to change its scattering response in view of camouflage and scattering manipulation applications. We present the analytical formulation for the case of a cylindrical object with the goal of deriving the surface impedance of the surrounding metasurface to make the object appearing as it were either larger or thinner. We find that not all the camouflage cases can be achieved by using only passive metasurfaces and active components may be required. The analytical and numerical results are discussed, in view of possible actual applications.
{"title":"Scattering camouflage and manipulation using metasurfaces","authors":"S. Vellucci, A. Monti, G. Oliveri, A. Massa, A. Toscano, F. Bilotti","doi":"10.1109/METAMATERIALS.2016.7746410","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2016.7746410","url":null,"abstract":"In this contribution, we propose the use of metasurfaces not only to cloak an object but also to change its scattering response in view of camouflage and scattering manipulation applications. We present the analytical formulation for the case of a cylindrical object with the goal of deriving the surface impedance of the surrounding metasurface to make the object appearing as it were either larger or thinner. We find that not all the camouflage cases can be achieved by using only passive metasurfaces and active components may be required. The analytical and numerical results are discussed, in view of possible actual applications.","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":"81044530","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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