Light emission from plasmonic nanostructures

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dc.citation.articleNumber060901
dc.citation.journalTitleThe Journal of Chemical Physics
dc.citation.volumeNumber155
dc.contributor.authorCai, Yi-Yu
dc.contributor.authorTauzin, Lawrence J.
dc.contributor.authorOstovar, Behnaz
dc.contributor.authorLee, Stephen
dc.contributor.authorLink, Stephan
dc.date.accessioned2021-09-21T15:37:35Z
dc.date.available2021-09-21T15:37:35Z
dc.date.issued2021
dc.description.abstractThe mechanism of light emission from metallic nanoparticles has been a subject of debate in recent years. Photoluminescence and electronic Raman scattering mechanisms have both been proposed to explain the observed emission from plasmonic nanostructures. Recent results from Stokes and anti-Stokes emission spectroscopy of single gold nanorods using continuous wave laser excitation carried out in our laboratory are summarized here. We show that varying excitation wavelength and power change the energy distribution of hot carriers and impact the emission spectral lineshape. We then examine the role of interband and intraband transitions in the emission lineshape by varying the particle size. We establish a relationship between the single particle emission quantum yield and its corresponding plasmonic resonance quality factor, which we also tune through nanorod crystallinity. Finally, based on anti-Stokes emission, we extract electron temperatures that further suggest a hot carrier based mechanism. The central role of hot carriers in our systematic study on gold nanorods as a model system supports a Purcell effect enhanced hot carrier photoluminescence mechanism. We end with a discussion on the impact of understanding the light emission mechanism on fields utilizing hot carrier distributions, such as photocatalysis and nanothermometry.
dc.identifier.citationCai, Yi-Yu, Tauzin, Lawrence J., Ostovar, Behnaz, et al.. "Light emission from plasmonic nanostructures." <i>The Journal of Chemical Physics,</i> 155, (2021) AIP Publishing LLC: https://doi.org/10.1063/5.0053320.
dc.identifier.digital5-0053320
dc.identifier.doihttps://doi.org/10.1063/5.0053320
dc.identifier.urihttps://hdl.handle.net/1911/111365
dc.language.isoeng
dc.publisherAIP Publishing LLC
dc.rightsAll article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/).
dc.titleLight emission from plasmonic nanostructures
dc.typeJournal article
dc.type.dcmiText
dc.type.publicationpublisher version
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