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Acousto-plasmonic Hot Spots in Metallic Nano-Objects

hal.structure.identifierCentre d'élaboration de matériaux et d'études structurales [CEMES]
dc.contributor.authorLARGE, Nicolas
hal.structure.identifierLaboratoire Interdisciplinaire Carnot de Bourgogne [ICB]
dc.contributor.authorSAVIOT, Lucien
hal.structure.identifierLaboratoire Interdisciplinaire Carnot de Bourgogne [ICB]
hal.structure.identifierLaser Processing Group
dc.contributor.authorMARGUERITAT, Jeremie
hal.structure.identifierLaser Processing Group
dc.contributor.authorGONZALO, Jose
hal.structure.identifierLaser Processing Group
dc.contributor.authorAFONSO, C.N.
hal.structure.identifierCentre d'élaboration de matériaux et d'études structurales [CEMES]
dc.contributor.authorARBOUET, Arnaud
hal.structure.identifierCentre de physique moléculaire optique et hertzienne [CPMOH]
dc.contributor.authorLANGOT, Pierre
hal.structure.identifierCentre d'élaboration de matériaux et d'études structurales [CEMES]
dc.contributor.authorMLAYAH, Adnen
dc.contributor.authorAIZPURUA, Javier
dc.date.issued2009-11-11
dc.identifier.issn1530-6984
dc.description.abstractEnWe investigate the acousto-plasmonic dynamics of metallic nano-objects by means of resonant Raman scattering and time-resolved femtosecond transient absorption. We observe an unexpectedly strong acoustic vibration band in the Raman scattering of silver nanocolumns, usually not found in isolated nano-objects. The frequency and the polarization of this unexpected Raman band allow us to assign it to breathing-like acoustic vibration modes. On the basis of full electromagnetic near-field calculations coupled to the elasticity theory, we introduce a new concept of “acousto-plasmonic hot spots” which arise here because of the indented shape of the nanocolumns. These hot spots combine both highly localized surface plasmons and strong shape deformation by the acoustic vibrations at specific sites of the nano-objects. We show that the coupling between breathing-like acoustic vibrations and surface plasmons at the “acousto-plasmonic hot spots” is strongly enhanced, turning almost silent vibration modes into efficient Raman scatterers.
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.title.enAcousto-plasmonic Hot Spots in Metallic Nano-Objects
dc.typeArticle de revue
dc.identifier.doi10.1021/nl901918a
dc.subject.halPhysique [physics]/Matière Condensée [cond-mat]/Science des matériaux [cond-mat.mtrl-sci]
bordeaux.journalNano Letters
bordeaux.page3732–3738
bordeaux.volume9
bordeaux.issue11
bordeaux.peerReviewedoui
hal.identifierhal-00431328
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00431328v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Nano%20Letters&rft.date=2009-11-11&rft.volume=9&rft.issue=11&rft.spage=3732%E2%80%933738&rft.epage=3732%E2%80%933738&rft.eissn=1530-6984&rft.issn=1530-6984&rft.au=LARGE,%20Nicolas&SAVIOT,%20Lucien&MARGUERITAT,%20Jeremie&GONZALO,%20Jose&AFONSO,%20C.N.&rft.genre=article


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