Controlling spoof plasmons in a metal grating using graphene surface plasmons
Autor(a) principal: | |
---|---|
Data de Publicação: | 2017 |
Outros Autores: | |
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. |
id |
RCAP_33d0e797d4bcadaf988e1a863c6e1da6 |
---|---|
oai_identifier_str |
oai:repositorium.sdum.uminho.pt:1822/47627 |
network_acronym_str |
RCAP |
network_name_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository_id_str |
7160 |
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 |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
|
_version_ |
1799132189517938688 |