Pub Date : 2016-09-01DOI: 10.1109/METAMATERIALS.2016.7746479
L. Prokopeva, Z. Kudyshev, A. Kildishev
Kubo's formalism for graphene surface conductivity is so far the most popular technique to model graphene in optics. However, its original integral form makes it inefficient for numerical evaluation and coupling to electromagnetic solvers since numerical integration shall be employed. In this paper we propose a Kubo-equivalent integration-free formulation for the computationally efficient modeling of the surface conductivity of graphene in time and frequency domains.
{"title":"Optical dispersion models for graphene: Integration-free formulations","authors":"L. Prokopeva, Z. Kudyshev, A. Kildishev","doi":"10.1109/METAMATERIALS.2016.7746479","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2016.7746479","url":null,"abstract":"Kubo's formalism for graphene surface conductivity is so far the most popular technique to model graphene in optics. However, its original integral form makes it inefficient for numerical evaluation and coupling to electromagnetic solvers since numerical integration shall be employed. In this paper we propose a Kubo-equivalent integration-free formulation for the computationally efficient modeling of the surface conductivity of graphene in time and frequency domains.","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":"83625731","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.2016.7746405
A. Uskov, I. Smetanin, I. Protsenko, J. Khurgin, M. Buret, A. Bouhelier
We investigate spontaneous light emission by electrons passing through a nanoscale metal constriction and find that the Purcell-enhanced emission is engendered by two distinct mechanisms. In the first mechanism emission is caused by electron colliding with the effective potential of the mesoscopic contact while the second mechanism involves collisions of electrons with the walls of the constriction. We find that multiple collisions with the walls can lead to the orders-of-magnitude higher light emission probability in comparison to a single collision with the effective potential.
{"title":"Nanoscale constriction as a source of plasmons for plasmonic nanocircuitries","authors":"A. Uskov, I. Smetanin, I. Protsenko, J. Khurgin, M. Buret, A. Bouhelier","doi":"10.1109/METAMATERIALS.2016.7746405","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2016.7746405","url":null,"abstract":"We investigate spontaneous light emission by electrons passing through a nanoscale metal constriction and find that the Purcell-enhanced emission is engendered by two distinct mechanisms. In the first mechanism emission is caused by electron colliding with the effective potential of the mesoscopic contact while the second mechanism involves collisions of electrons with the walls of the constriction. We find that multiple collisions with the walls can lead to the orders-of-magnitude higher light emission probability in comparison to a single collision with the effective potential.","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":"83631566","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.2016.7746468
R. Jurga, F. Della Sala, C. Ciracì
Quantum optics applications rely crucially on the control and long range transport of single-photons. We investigate how embedding a metal nanoparticle with an optical emitter in a fiber modifies the emission properties of the emitter. By coupling the light emitter to a metal nanoparticle, we show that the emission rates, Purcell factor and quantum yield are increased due to the combined effects originating both from the confinement in the fiber and from the nanoparticle's plasmonic enhancement. We simulate numerically a fiber of permittivity ε = 4 containing a silver nanoparticle of radius 30 nm and find that the quantum yield enhancement can be up to 2.5 larger than in free space.
{"title":"Plasmonic luminescence enhancement by metal nanoparticles embedded in nanofibers","authors":"R. Jurga, F. Della Sala, C. Ciracì","doi":"10.1109/METAMATERIALS.2016.7746468","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2016.7746468","url":null,"abstract":"Quantum optics applications rely crucially on the control and long range transport of single-photons. We investigate how embedding a metal nanoparticle with an optical emitter in a fiber modifies the emission properties of the emitter. By coupling the light emitter to a metal nanoparticle, we show that the emission rates, Purcell factor and quantum yield are increased due to the combined effects originating both from the confinement in the fiber and from the nanoparticle's plasmonic enhancement. We simulate numerically a fiber of permittivity ε = 4 containing a silver nanoparticle of radius 30 nm and find that the quantum yield enhancement can be up to 2.5 larger than in free space.","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":"80046898","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.2016.7746436
Y. Bobrovnitskiĭ
Theoretical solutions to the problems of acoustic invisibility (cloaking), of superabsorber of sound and some other are obtained in terms of certain surface impedance characteristics. The solutions can be realized with the help of coatings made of 2D acoustic or mechanical metamaterials that provide the needed surface impedances. Results of computer simulation and laboratory experiments of applying the impedance approach to the problems of cloaking and of the best absorber of sound are presented.
{"title":"Impedance approach to modeling and designing acoustic metamaterials","authors":"Y. Bobrovnitskiĭ","doi":"10.1109/METAMATERIALS.2016.7746436","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2016.7746436","url":null,"abstract":"Theoretical solutions to the problems of acoustic invisibility (cloaking), of superabsorber of sound and some other are obtained in terms of certain surface impedance characteristics. The solutions can be realized with the help of coatings made of 2D acoustic or mechanical metamaterials that provide the needed surface impedances. Results of computer simulation and laboratory experiments of applying the impedance approach to the problems of cloaking and of the best absorber of sound are presented.","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":"79012350","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.2016.7746449
M. Dipalo, F. Tantussi, V. Caprettini, A. Jacassi, V. Shalabaeva, A. Cerea, S. Perotto, F. De Angelis
In natural environments commonly appear periodic micro- and nano-structures exhibiting macroscopic properties different from the ones on the single elements. Typical examples are butterfly wings in optics, lotus leaves in fluidics or complex 3D neuronal networks in neuroscience and biology. Within this context, mimicking the intrinsic regularity exhibited by natural architectures can lead to unprecedented results addressing fundamental science but also intriguing challenges in technological applications. Here we will describe results we achieved by combining plasmonic nanostructures with nature-inspired superhydrophobic metamaterials. Then, we will try to extend this concept to the recent development of electronic devices with neuromorphic architectures for future computing.
{"title":"Mimicking and interfacing neuro-biological architectures with nanostructured materials","authors":"M. Dipalo, F. Tantussi, V. Caprettini, A. Jacassi, V. Shalabaeva, A. Cerea, S. Perotto, F. De Angelis","doi":"10.1109/METAMATERIALS.2016.7746449","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2016.7746449","url":null,"abstract":"In natural environments commonly appear periodic micro- and nano-structures exhibiting macroscopic properties different from the ones on the single elements. Typical examples are butterfly wings in optics, lotus leaves in fluidics or complex 3D neuronal networks in neuroscience and biology. Within this context, mimicking the intrinsic regularity exhibited by natural architectures can lead to unprecedented results addressing fundamental science but also intriguing challenges in technological applications. Here we will describe results we achieved by combining plasmonic nanostructures with nature-inspired superhydrophobic metamaterials. Then, we will try to extend this concept to the recent development of electronic devices with neuromorphic architectures for future 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":"77171602","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.2016.7746415
J. Xu, Hao Chi Zhang, T. Cui
We propose a method for decoupling of spoof plasmon-polaritons (SPPs) which are highly confined on two anti-parallel ultra thin corrugated strips. Periodic reversal of cross linking element between the two parallel pair, which can ensuring the continuity of the transmission waveguide and results in a π -phase shifting with the adjacent inversion units. At the junction between adjacent cells, periodic discontinuity of structure can be viewed as a perturbation to generate space harmonic, generating a mixed mode is operation in its leaky-wave region, thereby enabling the efficient coupling of surface-plasmon mode into free-space radiating modes. Leaky wave concept has found innovative applications in wavefront engineering, and we expect that these ideas could be an alternative to transform the spoof surface-plasmon mode into radiation.
{"title":"Decoupling from spoof surface plasmon polaritons waveguide by periodic reversal of cross-linking architecture","authors":"J. Xu, Hao Chi Zhang, T. Cui","doi":"10.1109/METAMATERIALS.2016.7746415","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2016.7746415","url":null,"abstract":"We propose a method for decoupling of spoof plasmon-polaritons (SPPs) which are highly confined on two anti-parallel ultra thin corrugated strips. Periodic reversal of cross linking element between the two parallel pair, which can ensuring the continuity of the transmission waveguide and results in a π -phase shifting with the adjacent inversion units. At the junction between adjacent cells, periodic discontinuity of structure can be viewed as a perturbation to generate space harmonic, generating a mixed mode is operation in its leaky-wave region, thereby enabling the efficient coupling of surface-plasmon mode into free-space radiating modes. Leaky wave concept has found innovative applications in wavefront engineering, and we expect that these ideas could be an alternative to transform the spoof surface-plasmon mode into radiation.","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":"88748153","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.2016.7746461
J. Lončar, S. Hrabar
Although numerous papers have been published in the area of parity-time symmetric systems recently, stability of those systems has only started to be explored. This study reports stability analysis of previously proposed parity-time symmetric system model based on mixed lumped/distributed network by finding pole locations in complex frequency domain.
{"title":"Stability of metasurface-based parity-time symmetric systems","authors":"J. Lončar, S. Hrabar","doi":"10.1109/METAMATERIALS.2016.7746461","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2016.7746461","url":null,"abstract":"Although numerous papers have been published in the area of parity-time symmetric systems recently, stability of those systems has only started to be explored. This study reports stability analysis of previously proposed parity-time symmetric system model based on mixed lumped/distributed network by finding pole locations in complex frequency domain.","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":"89912099","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.2016.7746486
O. Takayama, E. Shkondin, M. E. Aryaee Panah, T. Repan, R. Malureanu, F. Jensen, A. Lavrinenko
We analyze surface electromagnetic waves supported at the interface between isotropic medium and effective anisotropic material that can be realized by alternating conductive and dielectrics layers. This configuration can host various types of surface waves and therefore can serve as a rich platform for applications of surface photonics. Most of these surface waves are directional and as such their propagation can be effectively controlled by wavelength or material parameters tuning.
{"title":"Surface waves on metamaterials interfaces","authors":"O. Takayama, E. Shkondin, M. E. Aryaee Panah, T. Repan, R. Malureanu, F. Jensen, A. Lavrinenko","doi":"10.1109/METAMATERIALS.2016.7746486","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2016.7746486","url":null,"abstract":"We analyze surface electromagnetic waves supported at the interface between isotropic medium and effective anisotropic material that can be realized by alternating conductive and dielectrics layers. This configuration can host various types of surface waves and therefore can serve as a rich platform for applications of surface photonics. Most of these surface waves are directional and as such their propagation can be effectively controlled by wavelength or material parameters tuning.","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":"90235866","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.2016.7746385
T. Weisser, J. Groby, O. Dazel, L. Schwan
The acoustic behaviour of a metaporous materials constituted of resonant elastic shells embedded in a poro-elastic matrix is reported. The acoustic plane wave reflection from such an elastic-framed metaporous layer glued against rigid backing is studied. The analysis is performed by applying the multiple scattering theory in a dissipative Biot continuum while accounting for the fields scattered by the inclusion at the layer plane boundaries. It is shown that high broadband absorption of sound is achieved through the coupling of resonances of both the array and the shells with visco-thermal and elastic losses in the poro-elastic matrix. Moreover, the excitation of flexural resonances of the shells enable high-quality absorption of sound in the deep subwavelength regime. The semi-analytical approach of these multi-physical phenomena underlines the complex interactions between the scatterers and the poroelastic matrix, and allows the efficient computation of the fields.
{"title":"High broadband absorption of acoustic waves by elastic-framed metaporous layer","authors":"T. Weisser, J. Groby, O. Dazel, L. Schwan","doi":"10.1109/METAMATERIALS.2016.7746385","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2016.7746385","url":null,"abstract":"The acoustic behaviour of a metaporous materials constituted of resonant elastic shells embedded in a poro-elastic matrix is reported. The acoustic plane wave reflection from such an elastic-framed metaporous layer glued against rigid backing is studied. The analysis is performed by applying the multiple scattering theory in a dissipative Biot continuum while accounting for the fields scattered by the inclusion at the layer plane boundaries. It is shown that high broadband absorption of sound is achieved through the coupling of resonances of both the array and the shells with visco-thermal and elastic losses in the poro-elastic matrix. Moreover, the excitation of flexural resonances of the shells enable high-quality absorption of sound in the deep subwavelength regime. The semi-analytical approach of these multi-physical phenomena underlines the complex interactions between the scatterers and the poroelastic matrix, and allows the efficient computation of the fields.","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":"90306541","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.2016.7746489
S. Amanatiadis, N. Kantartzis
The direction of refracted graphene surface plasmon polariton waves due to the variation of their effective index is estimated in the current work. After the extraction of the fundamental relationships for the propagation properties of a graphene surface wave, the effective index is derived and the well-known Snell's law is utilized. Moreover, the direction angle is obtained by means of a comprehensive numerical analysis, addressing an accurate finite-difference time-domain algorithm, which validates all theoretical estimations.
{"title":"On the application of Snell's law for refracted graphene surface plasmon polaritonwaves","authors":"S. Amanatiadis, N. Kantartzis","doi":"10.1109/METAMATERIALS.2016.7746489","DOIUrl":"https://doi.org/10.1109/METAMATERIALS.2016.7746489","url":null,"abstract":"The direction of refracted graphene surface plasmon polariton waves due to the variation of their effective index is estimated in the current work. After the extraction of the fundamental relationships for the propagation properties of a graphene surface wave, the effective index is derived and the well-known Snell's law is utilized. Moreover, the direction angle is obtained by means of a comprehensive numerical analysis, addressing an accurate finite-difference time-domain algorithm, which validates all theoretical estimations.","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":"74531445","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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