Photoluminescence of a Plasmonic Molecule

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dc.citation.firstpage7072en_US
dc.citation.issueNumber7en_US
dc.citation.journalTitleACS Nanoen_US
dc.citation.lastpage7079en_US
dc.citation.volumeNumber9en_US
dc.contributor.authorHuang, Daen_US
dc.contributor.authorByers, Chad P.en_US
dc.contributor.authorWang, Lin-Yungen_US
dc.contributor.authorHoggard, Annelien_US
dc.contributor.authorHoener, Benen_US
dc.contributor.authorChang, Wei-Shunen_US
dc.contributor.authorLandes, Christy F.en_US
dc.contributor.authorLink, Stephanen_US
dc.contributor.orgLaboratory for Nanophotonicsen_US
dc.date.accessioned2015-10-01T15:40:10Zen_US
dc.date.available2015-10-01T15:40:10Zen_US
dc.date.issued2015en_US
dc.description.abstractPhotoluminescent Au nanoparticles are appealing for biosensing and bioimaging applications because of their non-photobleaching and non-photoblinking emission. The mechanism of one-photon photoluminescence from plasmonic nanostructures is still heavily debated though. Here, we report on the one-photon photoluminescence of strongly coupled 50 nm Au nanosphere dimers, the simplest plasmonic molecule. We observe emission from coupled plasmonic modes as revealed by single-particle photoluminescence spectra in comparison to correlated dark-field scattering spectroscopy. The photoluminescence quantum yield of the dimers is found to be surprisingly similar to the constituent monomers, suggesting that the increased local electric field of the dimer plays a minor role, in contradiction to several proposed mechanisms. Aided by electromagnetic simulations of scattering and absorption spectra, we conclude that our data are instead consistent with a multistep mechanism that involves the emission due to radiative decay of surface plasmons generated from excited electron–hole pairs following interband absorption.en_US
dc.identifier.citationHuang, Da, Byers, Chad P., Wang, Lin-Yung, et al.. "Photoluminescence of a Plasmonic Molecule." <i>ACS Nano,</i> 9, no. 7 (2015) American Chemical Society: 7072-7079. http://dx.doi.org/10.1021/acsnano.5b01634.en_US
dc.identifier.doihttp://dx.doi.org/10.1021/acsnano.5b01634en_US
dc.identifier.urihttps://hdl.handle.net/1911/81858en_US
dc.language.isoengen_US
dc.publisherAmerican Chemical Societyen_US
dc.rightsThis is an author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by the American Chemical Society.en_US
dc.subject.keywordphotoluminescenceen_US
dc.subject.keywordsurface plasmonen_US
dc.subject.keywordgold nanoparticleen_US
dc.subject.keywordnanoparticle dimeren_US
dc.subject.keywordplasmon couplingen_US
dc.titlePhotoluminescence of a Plasmonic Moleculeen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpost-printen_US
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