Optical Properties of Silver-Coated Silicon Nanowires: Morphological and Plasmonic Excitations

The optical extinction spectra of micro- and nanoparticles made up of high-contrast dielectrics exhibit a set of very intense peaks due to the excitations of morphology-dependent resonances (MDRs). These kind of resonances are well known at the microscopic scale as whispering gallery modes. In this...

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Detalles Bibliográficos
Autores: Lester, Marcelo Fabian, Abraham, Ricardo Martín
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2013
País:Argentina
Institución:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio:CONICET Digital (CONICET)
Idioma:inglés
OAI Identifier:oai:ri.conicet.gov.ar:11336/4579
Acceso en línea:http://hdl.handle.net/11336/4579
Access Level:acceso abierto
Palabra clave:Core-Shell Nanowires
Plasmonics
Mophologiy-Dependent Resonances
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
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spelling Optical Properties of Silver-Coated Silicon Nanowires: Morphological and Plasmonic ExcitationsLester, Marcelo FabianAbraham, Ricardo MartínCore-Shell NanowiresPlasmonicsMophologiy-Dependent Resonanceshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1The optical extinction spectra of micro- and nanoparticles made up of high-contrast dielectrics exhibit a set of very intense peaks due to the excitations of morphology-dependent resonances (MDRs). These kind of resonances are well known at the microscopic scale as whispering gallery modes. In this work, we study numerically the optical spectra corresponding to a core–shell structure composed by an infinite silicon nanowire coated with a silver shell. This structure shows a combination of both excitations: MDRs and the well-known surface plasmon resonances in dielectric metallic core–shell nanoparticles (Ekeroth Abraham and Lester, Plasmon 2012). We compute in an exact form the complete electromagnetic response for both bare and coated silicon nanowires in the range of 24–200 nm of cross-sectional sizes. We take into account an experimental bulk dielectric function of crystalline silicon and silver by using a correction by size of the metal dielectric function. In this paper, we consider small silver shells in the range of 1–10 nm of thickness as coatings. We analyze the optical response in both the far and near fields, involving wavelengths in the extended range of 300–2,400 nm. We show that the MDRs excited at the core are selectively perturbated by the metallic shell through the bonding and antibonding surface plasmons (SPs). This perturbation depends on both the size of the core and the thickness of the shell, and, as a consequence, we get an efficient tuneable and detectable simple system. Our calculations apply perfectly to long nanotubes compared to the wavelength for the two fundamental polarizations (s, p).Fil: Lester, Marcelo Fabian. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Tandil. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires; ArgentinaFil: Abraham, Ricardo Martín. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Tandil. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires; ArgentinaSpringer2013-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/4579Lester, Marcelo Fabian; Abraham, Ricardo Martín; Optical Properties of Silver-Coated Silicon Nanowires: Morphological and Plasmonic Excitations; Springer; Plasmonics; 8; 3; 4-2013; 1417-14281557-1955enginfo:eu-repo/semantics/altIdentifier/url/http://link.springer.com/article/10.1007%2Fs11468-013-9555-5info:eu-repo/semantics/altIdentifier/doi/10.1007/s11468-013-9555-5info:eu-repo/semantics/altIdentifier/issn/1557-1955info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2024-05-08T13:49:32Zoai:ri.conicet.gov.ar:11336/4579instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982024-05-08 13:49:33.237CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Optical Properties of Silver-Coated Silicon Nanowires: Morphological and Plasmonic Excitations
title Optical Properties of Silver-Coated Silicon Nanowires: Morphological and Plasmonic Excitations
spellingShingle Optical Properties of Silver-Coated Silicon Nanowires: Morphological and Plasmonic Excitations
Lester, Marcelo Fabian
Core-Shell Nanowires
Plasmonics
Mophologiy-Dependent Resonances
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
title_short Optical Properties of Silver-Coated Silicon Nanowires: Morphological and Plasmonic Excitations
title_full Optical Properties of Silver-Coated Silicon Nanowires: Morphological and Plasmonic Excitations
title_fullStr Optical Properties of Silver-Coated Silicon Nanowires: Morphological and Plasmonic Excitations
title_full_unstemmed Optical Properties of Silver-Coated Silicon Nanowires: Morphological and Plasmonic Excitations
title_sort Optical Properties of Silver-Coated Silicon Nanowires: Morphological and Plasmonic Excitations
dc.creator.none.fl_str_mv Lester, Marcelo Fabian
Abraham, Ricardo Martín
author Lester, Marcelo Fabian
author_facet Lester, Marcelo Fabian
Abraham, Ricardo Martín
author_role author
author2 Abraham, Ricardo Martín
author2_role author
dc.subject.none.fl_str_mv Core-Shell Nanowires
Plasmonics
Mophologiy-Dependent Resonances
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
topic Core-Shell Nanowires
Plasmonics
Mophologiy-Dependent Resonances
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
description The optical extinction spectra of micro- and nanoparticles made up of high-contrast dielectrics exhibit a set of very intense peaks due to the excitations of morphology-dependent resonances (MDRs). These kind of resonances are well known at the microscopic scale as whispering gallery modes. In this work, we study numerically the optical spectra corresponding to a core–shell structure composed by an infinite silicon nanowire coated with a silver shell. This structure shows a combination of both excitations: MDRs and the well-known surface plasmon resonances in dielectric metallic core–shell nanoparticles (Ekeroth Abraham and Lester, Plasmon 2012). We compute in an exact form the complete electromagnetic response for both bare and coated silicon nanowires in the range of 24–200 nm of cross-sectional sizes. We take into account an experimental bulk dielectric function of crystalline silicon and silver by using a correction by size of the metal dielectric function. In this paper, we consider small silver shells in the range of 1–10 nm of thickness as coatings. We analyze the optical response in both the far and near fields, involving wavelengths in the extended range of 300–2,400 nm. We show that the MDRs excited at the core are selectively perturbated by the metallic shell through the bonding and antibonding surface plasmons (SPs). This perturbation depends on both the size of the core and the thickness of the shell, and, as a consequence, we get an efficient tuneable and detectable simple system. Our calculations apply perfectly to long nanotubes compared to the wavelength for the two fundamental polarizations (s, p).
publishDate 2013
dc.date.none.fl_str_mv 2013-04
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/4579
Lester, Marcelo Fabian; Abraham, Ricardo Martín; Optical Properties of Silver-Coated Silicon Nanowires: Morphological and Plasmonic Excitations; Springer; Plasmonics; 8; 3; 4-2013; 1417-1428
1557-1955
url http://hdl.handle.net/11336/4579
identifier_str_mv Lester, Marcelo Fabian; Abraham, Ricardo Martín; Optical Properties of Silver-Coated Silicon Nanowires: Morphological and Plasmonic Excitations; Springer; Plasmonics; 8; 3; 4-2013; 1417-1428
1557-1955
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://link.springer.com/article/10.1007%2Fs11468-013-9555-5
info:eu-repo/semantics/altIdentifier/doi/10.1007/s11468-013-9555-5
info:eu-repo/semantics/altIdentifier/issn/1557-1955
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Springer
publisher.none.fl_str_mv Springer
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 15,811543

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