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dc.contributor.author
Lester, Marcelo Fabian
dc.contributor.author
Abraham, Ricardo Martín
dc.date.available
2016-03-02T17:51:06Z
dc.date.issued
2013-04
dc.identifier.citation
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
dc.identifier.issn
1557-1955
dc.identifier.uri
http://hdl.handle.net/11336/4579
dc.description.abstract
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).
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Springer
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Core-Shell Nanowires
dc.subject
Plasmonics
dc.subject
Mophologiy-Dependent Resonances
dc.subject.classification
Óptica
dc.subject.classification
Ciencias Físicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Optical Properties of Silver-Coated Silicon Nanowires: Morphological and Plasmonic Excitations
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2016-03-30 10:35:44.97925-03
dc.journal.volume
8
dc.journal.number
3
dc.journal.pagination
1417-1428
dc.journal.pais
Alemania
dc.journal.ciudad
Berlin
dc.description.fil
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; Argentina
dc.description.fil
Fil: 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; Argentina
dc.journal.title
Plasmonics
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://link.springer.com/article/10.1007%2Fs11468-013-9555-5
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1007/s11468-013-9555-5
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/issn/1557-1955
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