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dc.contributor.authorGarcia de Abajo, Francisco Javier
dc.contributor.authorCox, Joel D.
dc.contributor.otherUniversitat Politècnica de Catalunya. Institut de Ciències Fotòniques
dc.identifier.citationGarcia de Abajo, Francisco Javier; Cox, Joel D. Electrically tunable nonlinear plasmonics in graphene nanoislands. "Nature Communications", 11 Desembre 2014, vol. 5, núm. 5725.
dc.description.abstractNonlinear optical processes rely on the intrinsically weak interactions between photons enabled by their coupling with matter. Unfortunately, many applications in nonlinear optics are severely hindered by the small response of conventional materials. Metallic nanostructures partially alleviate this situation, as the large light enhancement associated with their localized plasmons amplifies their nonlinear response to record high levels. Graphene hosts long-lived, electrically tunable plasmons that also interact strongly with light. Here we show that the nonlinear polarizabilities of graphene nanoislands can be electrically tuned to surpass by several orders of magnitude those of metal nanoparticles of similar size. This extraordinary behaviour extends over the visible and near-infrared spectrum for islands consisting of hundreds of carbon atoms doped with moderate carrier densities. Our quantum-mechanical simulations of the plasmon-enhanced optical response of nanographene reveal this material as an ideal platform for the development of electrically tunable nonlinear optical nanodevices.
dc.publisherNature Publishin group
dc.subjectÀrees temàtiques de la UPC::Física
dc.subject.otherPhysical Sciences
dc.subject.otherOptical physics
dc.titleElectrically tunable nonlinear plasmonics in graphene nanoislands
dc.description.peerreviewedPeer Reviewed
dc.rights.accessOpen Access
dc.description.versionPostprint (published version)
dc.relation.projectidinfo:eu-repo/grantAgreement/EC/FP7/604391/EU/Graphene-Based Revolutions in ICT And Beyond/GRAPHENE
dc.relation.projectidinfo:eu-repo/grantAgreement/EC/FP7/613024/EU/GRAPHENE-BASED SINGLE-PHOTON NONLINEAR OPTICAL DEVICES/GRASP
upcommons.citation.authorGarcia de Abajo, Francisco Javier; Cox, Joel D.
upcommons.citation.publicationNameNature Communications

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