Controlling spoof plasmons in a metal grating using graphene surface plasmons

Detalhes bibliográficos
Autor(a) principal: Dias, Eduardo J. C.
Data de Publicação: 2017
Outros Autores: Peres, N. M. R.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/1822/47627
Resumo: Spoof plasmons mimic noble metal plasmons. The equivalent of the plasma frequency is an energy scale imposed by the geometry of the metal grating upon which they propagate. In this paper we show that the dispersion of spoof plasmons in the THz can be controlled placing a doped graphene sheet on the proximity of a metallic grating, adding more versatility to this type of system. We develop a semi-analytical model, based on a perfect-metal diffraction grating. This model allows to reproduce well FDTD calculations for the same problem but with much less computer time. We discuss the optical properties of the system covering a spectral range spanning the interval from the THz to the mid-IR. It is shown that the system can be used as both a perfect absorber and a sensing device. For illustrating the latter property we have chosen different alcohols as analytes. The frequency at which perfect absorption appears can be controlled by the geometric parameters of the grating and by the value of the Fermi energy in graphene. The theoretical results predicted throughout this work can be verified experimentally in the future.
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spelling Controlling spoof plasmons in a metal grating using graphene surface plasmonsGrapheneSpoof PlasmonsPlasmonicsGratingsGraphene plasmonsPerfect absorberSensingCiências Naturais::Ciências FísicasScience & TechnologySpoof plasmons mimic noble metal plasmons. The equivalent of the plasma frequency is an energy scale imposed by the geometry of the metal grating upon which they propagate. In this paper we show that the dispersion of spoof plasmons in the THz can be controlled placing a doped graphene sheet on the proximity of a metallic grating, adding more versatility to this type of system. We develop a semi-analytical model, based on a perfect-metal diffraction grating. This model allows to reproduce well FDTD calculations for the same problem but with much less computer time. We discuss the optical properties of the system covering a spectral range spanning the interval from the THz to the mid-IR. It is shown that the system can be used as both a perfect absorber and a sensing device. For illustrating the latter property we have chosen different alcohols as analytes. The frequency at which perfect absorption appears can be controlled by the geometric parameters of the grating and by the value of the Fermi energy in graphene. The theoretical results predicted throughout this work can be verified experimentally in the future.EC -European Commission(696656)info:eu-repo/semantics/acceptedVersionACS PublicationsUniversidade do MinhoDias, Eduardo J. C.Peres, N. M. R.2017-08-052017-08-05T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/47627engDias, E. J., & Peres, N. M. R. (2017). Controlling spoof plasmons in a metal grating using graphene surface plasmons. ACS Photonics2330-40222330-402210.1021/acsphotonics.7b00629http://pubs.acs.org/doi/abs/10.1021/acsphotonics.7b00629info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-21T11:54:37Zoai:repositorium.sdum.uminho.pt:1822/47627Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T18:44:05.803932Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Controlling spoof plasmons in a metal grating using graphene surface plasmons
title Controlling spoof plasmons in a metal grating using graphene surface plasmons
spellingShingle Controlling spoof plasmons in a metal grating using graphene surface plasmons
Dias, Eduardo J. C.
Graphene
Spoof Plasmons
Plasmonics
Gratings
Graphene plasmons
Perfect absorber
Sensing
Ciências Naturais::Ciências Físicas
Science & Technology
title_short Controlling spoof plasmons in a metal grating using graphene surface plasmons
title_full Controlling spoof plasmons in a metal grating using graphene surface plasmons
title_fullStr Controlling spoof plasmons in a metal grating using graphene surface plasmons
title_full_unstemmed Controlling spoof plasmons in a metal grating using graphene surface plasmons
title_sort Controlling spoof plasmons in a metal grating using graphene surface plasmons
author Dias, Eduardo J. C.
author_facet Dias, Eduardo J. C.
Peres, N. M. R.
author_role author
author2 Peres, N. M. R.
author2_role author
dc.contributor.none.fl_str_mv Universidade do Minho
dc.contributor.author.fl_str_mv Dias, Eduardo J. C.
Peres, N. M. R.
dc.subject.por.fl_str_mv Graphene
Spoof Plasmons
Plasmonics
Gratings
Graphene plasmons
Perfect absorber
Sensing
Ciências Naturais::Ciências Físicas
Science & Technology
topic Graphene
Spoof Plasmons
Plasmonics
Gratings
Graphene plasmons
Perfect absorber
Sensing
Ciências Naturais::Ciências Físicas
Science & Technology
description Spoof plasmons mimic noble metal plasmons. The equivalent of the plasma frequency is an energy scale imposed by the geometry of the metal grating upon which they propagate. In this paper we show that the dispersion of spoof plasmons in the THz can be controlled placing a doped graphene sheet on the proximity of a metallic grating, adding more versatility to this type of system. We develop a semi-analytical model, based on a perfect-metal diffraction grating. This model allows to reproduce well FDTD calculations for the same problem but with much less computer time. We discuss the optical properties of the system covering a spectral range spanning the interval from the THz to the mid-IR. It is shown that the system can be used as both a perfect absorber and a sensing device. For illustrating the latter property we have chosen different alcohols as analytes. The frequency at which perfect absorption appears can be controlled by the geometric parameters of the grating and by the value of the Fermi energy in graphene. The theoretical results predicted throughout this work can be verified experimentally in the future.
publishDate 2017
dc.date.none.fl_str_mv 2017-08-05
2017-08-05T00:00:00Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/1822/47627
url http://hdl.handle.net/1822/47627
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Dias, E. J., & Peres, N. M. R. (2017). Controlling spoof plasmons in a metal grating using graphene surface plasmons. ACS Photonics
2330-4022
2330-4022
10.1021/acsphotonics.7b00629
http://pubs.acs.org/doi/abs/10.1021/acsphotonics.7b00629
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv ACS Publications
publisher.none.fl_str_mv ACS Publications
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
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reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
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