Nonlinear Plasmonic Sensing with Nanographene

Plasmons provide excellent sensitivity to detect analyte molecules through their strong interaction with the dielectric environment. Plasmonic sensors based on noble metals are, however, limited by the spectral broadening of these excitations. Here we identify a new mechanism that reveals the presen...

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Detalles Bibliográficos
Autores: Yu, Renwen, Cox, Joel D., García de Abajo, Francisco Javier
Tipo de recurso: artículo
Fecha de publicación:2016
País:España
Institución:Universitat Politècnica de Catalunya (UPC)
Repositorio:UPCommons. Portal del coneixement obert de la UPC
Idioma:inglés
OAI Identifier:oai:upcommons.upc.edu:2117/101765
Acceso en línea:https://hdl.handle.net/2117/101765
Access Level:acceso abierto
Palabra clave:Graphene
grafè
Grafè
Àrees temàtiques de la UPC::Física
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spelling Nonlinear Plasmonic Sensing with NanographeneYu, RenwenCox, Joel D.García de Abajo, Francisco JavierGraphenegrafèGrafèÀrees temàtiques de la UPC::FísicaPlasmons provide excellent sensitivity to detect analyte molecules through their strong interaction with the dielectric environment. Plasmonic sensors based on noble metals are, however, limited by the spectral broadening of these excitations. Here we identify a new mechanism that reveals the presence of individual molecules through the radical changes that they produce in the plasmons of graphene nanoislands. An elementary charge or a weak permanent dipole carried by the molecule are shown to be sufficient to trigger observable modifications in the linear absorption spectra and the nonlinear response of the nanoislands. In particular, a strong second-harmonic signal, forbidden by symmetry in the unexposed graphene nanostructure, emerges due to a redistribution of conduction electrons produced by interaction with the molecule. These results pave the way toward ultrasensitive nonlinear detection of dipolar molecules and molecular radicals that is made possible by the extraordinary optoelectronic properties of graphene.Peer ReviewedAPS20162016-09-1620172017-03-01journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2117/101765reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)InglésengEuropean Commission http://dx.doi.org/10.13039/100011102 Seventh Framework Programme 613024 GRAPHENE-BASED SINGLE-PHOTON NONLINEAR OPTICAL DEVICESopen accesshttp://purl.org/coar/access_right/c_abf2Attribution-NonCommercial-NoDerivs 3.0 Spainhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/1017652026-05-27T15:37:01Z
dc.title.none.fl_str_mv Nonlinear Plasmonic Sensing with Nanographene
title Nonlinear Plasmonic Sensing with Nanographene
spellingShingle Nonlinear Plasmonic Sensing with Nanographene
Yu, Renwen
Graphene
grafè
Grafè
Àrees temàtiques de la UPC::Física
title_short Nonlinear Plasmonic Sensing with Nanographene
title_full Nonlinear Plasmonic Sensing with Nanographene
title_fullStr Nonlinear Plasmonic Sensing with Nanographene
title_full_unstemmed Nonlinear Plasmonic Sensing with Nanographene
title_sort Nonlinear Plasmonic Sensing with Nanographene
dc.creator.none.fl_str_mv Yu, Renwen
Cox, Joel D.
García de Abajo, Francisco Javier
author Yu, Renwen
author_facet Yu, Renwen
Cox, Joel D.
García de Abajo, Francisco Javier
author_role author
author2 Cox, Joel D.
García de Abajo, Francisco Javier
author2_role author
author
dc.subject.none.fl_str_mv Graphene
grafè
Grafè
Àrees temàtiques de la UPC::Física
topic Graphene
grafè
Grafè
Àrees temàtiques de la UPC::Física
description Plasmons provide excellent sensitivity to detect analyte molecules through their strong interaction with the dielectric environment. Plasmonic sensors based on noble metals are, however, limited by the spectral broadening of these excitations. Here we identify a new mechanism that reveals the presence of individual molecules through the radical changes that they produce in the plasmons of graphene nanoislands. An elementary charge or a weak permanent dipole carried by the molecule are shown to be sufficient to trigger observable modifications in the linear absorption spectra and the nonlinear response of the nanoislands. In particular, a strong second-harmonic signal, forbidden by symmetry in the unexposed graphene nanostructure, emerges due to a redistribution of conduction electrons produced by interaction with the molecule. These results pave the way toward ultrasensitive nonlinear detection of dipolar molecules and molecular radicals that is made possible by the extraordinary optoelectronic properties of graphene.
publishDate 2016
dc.date.none.fl_str_mv 2016
2016-09-16
2017
2017-03-01
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/2117/101765
url https://hdl.handle.net/2117/101765
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv European Commission http://dx.doi.org/10.13039/100011102 Seventh Framework Programme 613024 GRAPHENE-BASED SINGLE-PHOTON NONLINEAR OPTICAL DEVICES
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
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
Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv APS
publisher.none.fl_str_mv APS
dc.source.none.fl_str_mv reponame:UPCommons. Portal del coneixement obert de la UPC
instname:Universitat Politècnica de Catalunya (UPC)
instname_str Universitat Politècnica de Catalunya (UPC)
reponame_str UPCommons. Portal del coneixement obert de la UPC
collection UPCommons. Portal del coneixement obert de la UPC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.301603

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