Show simple item record

dc.contributor.authorYu, Renwen
dc.contributor.authorCox, Joel D.
dc.contributor.authorGarcía de Abajo, Francisco Javier
dc.contributor.otherUniversitat Politècnica de Catalunya. Institut de Ciències Fotòniques
dc.date.accessioned2017-03-01T09:46:12Z
dc.date.available2017-03-01T09:46:12Z
dc.date.issued2016-09-16
dc.identifier.citationYu, R.; Cox, J. D.; García de Abajo, F. J. Nonlinear Plasmonic Sensing with Nanographene. "Physical Review Letters", 16 Setembre 2016, vol. 117, núm. 123904, p. 1-6.
dc.identifier.issn0031-9007
dc.identifier.urihttp://hdl.handle.net/2117/101765
dc.description.abstractPlasmons 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.
dc.format.extent6 p.
dc.language.isoeng
dc.publisherAPS
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spain
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subjectÀrees temàtiques de la UPC::Física
dc.subject.lcshGraphene
dc.subject.othergrafè
dc.titleNonlinear Plasmonic Sensing with Nanographene
dc.typeArticle
dc.subject.lemacGrafè
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttp://journals.aps.org/prl/abstract/10.1103/PhysRevLett.117.123904
dc.rights.accessOpen Access
dc.description.versionPostprint (published version)
dc.relation.projectidinfo:eu-repo/grantAgreement/EC/FP7/613024/EU/GRAPHENE-BASED SINGLE-PHOTON NONLINEAR OPTICAL DEVICES/GRASP
upcommons.citation.pubplaceUSA
upcommons.citation.publishedtrue
upcommons.citation.publicationNamePhysical Review Letters
upcommons.citation.volume117
upcommons.citation.number123904
upcommons.citation.startingPage1
upcommons.citation.endingPage6


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record

Except where otherwise noted, content on this work is licensed under a Creative Commons license: Attribution-NonCommercial-NoDerivs 3.0 Spain