High-Contrast Fano Resonances in Single Semiconductor Nanorods

Fano resonances in plasmonics have received widespread attention for their distinctly narrow asymmetric line shapes. A variety of configurations have been considered, either requiring complex metallic nanostructures or being extremely faint if originated in simple single nanoparticles. Here we repor...

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Detalles Bibliográficos
Autores: Abujetas, Diego R., Mandujano, Miguel A. G., Méndez, Eugenio R., Sánchez-Gil, José A.
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2017
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/161145
Acceso en línea:http://hdl.handle.net/10261/161145
Access Level:acceso abierto
Palabra clave:Magnetic light
Fano resonance
Fabry−Perot waveguide modes
Mie scattering
Semiconductor nanorod
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spelling High-Contrast Fano Resonances in Single Semiconductor NanorodsAbujetas, Diego R.Mandujano, Miguel A. G.Méndez, Eugenio R.Sánchez-Gil, José A.Magnetic lightFano resonanceFabry−Perot waveguide modesMie scatteringSemiconductor nanorodFano resonances in plasmonics have received widespread attention for their distinctly narrow asymmetric line shapes. A variety of configurations have been considered, either requiring complex metallic nanostructures or being extremely faint if originated in simple single nanoparticles. Here we report on the emergence of high-contrast, strongly asymmetric Fano line shapes in the light scattered from semiconductor nanorods. Numerical calculations are carried out for the scattering cross sections of finite semiconducting nanorods, with dimensions such that the lowest-order (transverse) Mie resonances coexist with the lowest-order guided modes. Such intense narrow Fano resonances are strongly/weakly asymmetric in TE/TM polarization and overlap with the Mie-like background. A physical interpretation is presented stemming from the (strong or weak) interference of the far-field angular patterns of Mie resonances (indeed, of both magnetic and dielectric dipole character) with narrow Fabry-Perot (guided mode) resonances, the latter calculated through a 1D line current model. A quasi-analytical expression is developed for the scattering cross sections that reproduce fairly well the Fano numerical line shapes, along with a generalized Fano formula, with fitting factors confirming their high asymmetry and contrast. These high-contrast, strongly asymmetric Fano resonances herein obtained could be potentially exploited in nanophotonics and sensing in the visible and near-IR, eased by simplified fabrication requirements of shape (nanorod) and material (semiconductor).This work has been supported by the Spanish “Ministerio de Economía y Competitividad” (projects LENSBEAM FIS2015-69295-C3-2-P and RedMETA TEC2015- 69195-REDC, and FPU Fellowship) and CSIC (project NANOPHOTOPLAS, i-COOP LIGHT 2015CD0011).Peer ReviewedAmerican Chemical SocietyMinisterio de Economía y Competitividad (España)Consejo Superior de Investigaciones Científicas (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2018201820172018info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/161145reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/FIS2015-69295-C3-2-PSíinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1611452026-05-22T06:33:51Z
dc.title.none.fl_str_mv High-Contrast Fano Resonances in Single Semiconductor Nanorods
title High-Contrast Fano Resonances in Single Semiconductor Nanorods
spellingShingle High-Contrast Fano Resonances in Single Semiconductor Nanorods
Abujetas, Diego R.
Magnetic light
Fano resonance
Fabry−Perot waveguide modes
Mie scattering
Semiconductor nanorod
title_short High-Contrast Fano Resonances in Single Semiconductor Nanorods
title_full High-Contrast Fano Resonances in Single Semiconductor Nanorods
title_fullStr High-Contrast Fano Resonances in Single Semiconductor Nanorods
title_full_unstemmed High-Contrast Fano Resonances in Single Semiconductor Nanorods
title_sort High-Contrast Fano Resonances in Single Semiconductor Nanorods
dc.creator.none.fl_str_mv Abujetas, Diego R.
Mandujano, Miguel A. G.
Méndez, Eugenio R.
Sánchez-Gil, José A.
author Abujetas, Diego R.
author_facet Abujetas, Diego R.
Mandujano, Miguel A. G.
Méndez, Eugenio R.
Sánchez-Gil, José A.
author_role author
author2 Mandujano, Miguel A. G.
Méndez, Eugenio R.
Sánchez-Gil, José A.
author2_role author
author
author
dc.contributor.none.fl_str_mv Ministerio de Economía y Competitividad (España)
Consejo Superior de Investigaciones Científicas (España)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Magnetic light
Fano resonance
Fabry−Perot waveguide modes
Mie scattering
Semiconductor nanorod
topic Magnetic light
Fano resonance
Fabry−Perot waveguide modes
Mie scattering
Semiconductor nanorod
description Fano resonances in plasmonics have received widespread attention for their distinctly narrow asymmetric line shapes. A variety of configurations have been considered, either requiring complex metallic nanostructures or being extremely faint if originated in simple single nanoparticles. Here we report on the emergence of high-contrast, strongly asymmetric Fano line shapes in the light scattered from semiconductor nanorods. Numerical calculations are carried out for the scattering cross sections of finite semiconducting nanorods, with dimensions such that the lowest-order (transverse) Mie resonances coexist with the lowest-order guided modes. Such intense narrow Fano resonances are strongly/weakly asymmetric in TE/TM polarization and overlap with the Mie-like background. A physical interpretation is presented stemming from the (strong or weak) interference of the far-field angular patterns of Mie resonances (indeed, of both magnetic and dielectric dipole character) with narrow Fabry-Perot (guided mode) resonances, the latter calculated through a 1D line current model. A quasi-analytical expression is developed for the scattering cross sections that reproduce fairly well the Fano numerical line shapes, along with a generalized Fano formula, with fitting factors confirming their high asymmetry and contrast. These high-contrast, strongly asymmetric Fano resonances herein obtained could be potentially exploited in nanophotonics and sensing in the visible and near-IR, eased by simplified fabrication requirements of shape (nanorod) and material (semiconductor).
publishDate 2017
dc.date.none.fl_str_mv 2017
2018
2018
2018
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/161145
url http://hdl.handle.net/10261/161145
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/FIS2015-69295-C3-2-P
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv American Chemical Society
publisher.none.fl_str_mv American Chemical Society
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,811543

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