Coupled surface plasmons and resonant optical tunnelling in symmetric optical microcavities

This study presents an analytical model for light transmission through a symmetric optical microcavity. The structure comprises two metallic films separated by a thin layer of a low refractive index dielectric, and embedded within a semi-infinite dielectric of higher refractive index. This configura...

ver descrição completa

Detalhes bibliográficos
Autores: Doval Casas, Alejandro, Arosa Lobato, Yago, Fuente Carballo, Raúl de la
Tipo de documento: artigo
Data de publicação:2025
País:España
Recursos:Universidad de Santiago de Compostela (USC)
Repositório:Minerva. Repositorio Institucional de la Universidad de Santiago de Compostela
Idioma:inglês
OAI Identifier:oai:minerva.usc.gal:10347/43937
Acesso em linha:https://hdl.handle.net/10347/43937
Access Level:Acceso aberto
Palavra-chave:Coupled surface plasmons
Resonance
Microcavity
Evanescent wave
Attenuated optical tunnelling
id ES_3b997e80a8d183159aa027a59490c23a
oai_identifier_str oai:minerva.usc.gal:10347/43937
network_acronym_str ES
network_name_str España
repository_id_str
spelling Coupled surface plasmons and resonant optical tunnelling in symmetric optical microcavitiesDoval Casas, AlejandroArosa Lobato, YagoFuente Carballo, Raúl de laCoupled surface plasmonsResonanceMicrocavityEvanescent waveAttenuated optical tunnellingThis study presents an analytical model for light transmission through a symmetric optical microcavity. The structure comprises two metallic films separated by a thin layer of a low refractive index dielectric, and embedded within a semi-infinite dielectric of higher refractive index. This configuration supports both volume and surface resonances. The surface resonances result from synchronised collective electronic oscillations at the inner surfaces of the two thin metallic films, called coupled surface plasmons. For clarity, surface resonances are first defined and analysed considering the Drude model for ideal, lossless metal films. The model is then extended using the generalised complex Drude model, which accounts for losses. The results depict that high transmittance is possible even when the thickness of the inner dielectric layer spans several wavelengths. This phenomenon is an enhanced form of frustrated total reflection between dielectrics analogous to the quantum tunnelling effect. The phenomenon is more pronounced because of the two absorbing metal films. Under resonant conditions, these films enable unusually high transmission despite their inherent losses. Experimental results are presented in excellent agreement with the theoretical predictions. This proposed transmission model in a plasmonic microcavity provides a foundation for future theoretical research and potential applications of plasmonic microcavity devices.ElsevierUniversidade de Santiago de Compostela. Instituto de Materiais (iMATUS)Universidade de Santiago de Compostela. Departamento de Física de Partículas20252025-07-2420252025-07-24journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/10347/43937reponame:Minerva. Repositorio Institucional de la Universidad de Santiago de Compostelainstname:Universidad de Santiago de Compostela (USC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2© 2025 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by- nc-nd/4.0/).http://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:minerva.usc.gal:10347/439372026-06-15T12:47:27Z
dc.title.none.fl_str_mv Coupled surface plasmons and resonant optical tunnelling in symmetric optical microcavities
title Coupled surface plasmons and resonant optical tunnelling in symmetric optical microcavities
spellingShingle Coupled surface plasmons and resonant optical tunnelling in symmetric optical microcavities
Doval Casas, Alejandro
Coupled surface plasmons
Resonance
Microcavity
Evanescent wave
Attenuated optical tunnelling
title_short Coupled surface plasmons and resonant optical tunnelling in symmetric optical microcavities
title_full Coupled surface plasmons and resonant optical tunnelling in symmetric optical microcavities
title_fullStr Coupled surface plasmons and resonant optical tunnelling in symmetric optical microcavities
title_full_unstemmed Coupled surface plasmons and resonant optical tunnelling in symmetric optical microcavities
title_sort Coupled surface plasmons and resonant optical tunnelling in symmetric optical microcavities
dc.creator.none.fl_str_mv Doval Casas, Alejandro
Arosa Lobato, Yago
Fuente Carballo, Raúl de la
author Doval Casas, Alejandro
author_facet Doval Casas, Alejandro
Arosa Lobato, Yago
Fuente Carballo, Raúl de la
author_role author
author2 Arosa Lobato, Yago
Fuente Carballo, Raúl de la
author2_role author
author
dc.contributor.none.fl_str_mv Universidade de Santiago de Compostela. Instituto de Materiais (iMATUS)
Universidade de Santiago de Compostela. Departamento de Física de Partículas
dc.subject.none.fl_str_mv Coupled surface plasmons
Resonance
Microcavity
Evanescent wave
Attenuated optical tunnelling
topic Coupled surface plasmons
Resonance
Microcavity
Evanescent wave
Attenuated optical tunnelling
description This study presents an analytical model for light transmission through a symmetric optical microcavity. The structure comprises two metallic films separated by a thin layer of a low refractive index dielectric, and embedded within a semi-infinite dielectric of higher refractive index. This configuration supports both volume and surface resonances. The surface resonances result from synchronised collective electronic oscillations at the inner surfaces of the two thin metallic films, called coupled surface plasmons. For clarity, surface resonances are first defined and analysed considering the Drude model for ideal, lossless metal films. The model is then extended using the generalised complex Drude model, which accounts for losses. The results depict that high transmittance is possible even when the thickness of the inner dielectric layer spans several wavelengths. This phenomenon is an enhanced form of frustrated total reflection between dielectrics analogous to the quantum tunnelling effect. The phenomenon is more pronounced because of the two absorbing metal films. Under resonant conditions, these films enable unusually high transmission despite their inherent losses. Experimental results are presented in excellent agreement with the theoretical predictions. This proposed transmission model in a plasmonic microcavity provides a foundation for future theoretical research and potential applications of plasmonic microcavity devices.
publishDate 2025
dc.date.none.fl_str_mv 2025
2025-07-24
2025
2025-07-24
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/10347/43937
url https://hdl.handle.net/10347/43937
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Minerva. Repositorio Institucional de la Universidad de Santiago de Compostela
instname:Universidad de Santiago de Compostela (USC)
instname_str Universidad de Santiago de Compostela (USC)
reponame_str Minerva. Repositorio Institucional de la Universidad de Santiago de Compostela
collection Minerva. Repositorio Institucional de la Universidad de Santiago de Compostela
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869406316559073280
score 15,228081

Registros relacionados