Coherent Fano resonances in a plasmonic nanocluster enhance optical four-wave mixing

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dc.citation.journalTitlePNAS Early Edition
dc.contributor.authorZhang, Yu
dc.contributor.authorWen, Fangfang
dc.contributor.authorZhen, Yu-Rong
dc.contributor.authorNordlander, Peter
dc.contributor.authorHalas, Naomi J.
dc.contributor.orgLaboratory for Nanophotonics
dc.date.accessioned2013-06-19T17:16:53Z
dc.date.available2013-06-19T17:16:53Z
dc.date.issued2013
dc.description.abstractPlasmonic nanoclusters, an ordered assembly of coupled metallic nanoparticles, support unique spectral features known as Fano resonances due to the coupling between their subradiant and superradiant plasmon modes. Within the Fano resonance, absorption is significantly enhanced, giving rise to highly localized, intense near fields with the potential to enhance nonlinear optical processes. Here, we report a structure supporting the coherent oscillation of two distinct Fano resonances within an individual plasmonic nanocluster. We show how this coherence enhances the optical four-wave mixing process in comparison with other doubleresonant plasmonic clusters that lack this property. A model that explains the observed four-wave mixing features is proposed, which is generally applicable to any third-order process in plasmonic nanostructures. With a larger effective susceptibility χ (3) relative to existing nonlinear optical materials, this coherent double-resonant nanocluster offers a strategy for designing high-performance thirdorder nonlinear optical media.
dc.embargo.termsnone
dc.identifier.citationZhang, Yu, Wen, Fangfang, Zhen, Yu-Rong, et al.. "Coherent Fano resonances in a plasmonic nanocluster enhance optical four-wave mixing." <i>PNAS Early Edition,</i> (2013) National Academy of Sciences: http://dx.doi.org/10.1073/pnas.1220304110.
dc.identifier.doihttp://dx.doi.org/10.1073/pnas.1220304110
dc.identifier.urihttps://hdl.handle.net/1911/71331
dc.language.isoeng
dc.publisherNational Academy of Sciences
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
dc.subject.keywordnanostructured materials
dc.subject.keywordnonlinear optics
dc.subject.keywordphase matching
dc.titleCoherent Fano resonances in a plasmonic nanocluster enhance optical four-wave mixing
dc.typeJournal article
dc.type.dcmiText
dc.type.publicationpublisher version
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