Light Emission from Single Plasmonic Nanoparticles

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dc.contributor.advisorLink, Stephanen_US
dc.creatorCai, Yiyuen_US
dc.date.accessioned2019-08-01T20:24:02Zen_US
dc.date.available2020-08-01T05:01:08Zen_US
dc.date.created2019-08en_US
dc.date.issued2019-07-19en_US
dc.date.submittedAugust 2019en_US
dc.date.updated2019-08-01T20:24:03Zen_US
dc.description.abstractThe precise mechanism of light emission from metallic plasmonic nanoparticles is a contested issue. Photoluminescence and electronic Raman scattering are two different views proposed to explain the observed emission from plasmonic nanostructures. The Stokes and anti-Stokes emission spectroscopy studies of single gold nanorods are reported. A model was developed to quantitatively simulate the experimental emission spectra of gold nanorods. Correlated emission spectra and quantum yields of single gold nanorods with different excitation wavelengths and varied excitation powers demonstrate the underlying effects of hot carrier dynamics following interband and intraband transitions. The plasmonic resonance quality factors, modified by nanorod crystallinity, determine the Purcell enhancement effect and have a linear relation with the emission quantum yield. The central role of hot carriers in the systematical study on gold nanorods as a model system supports a Purcell effect enhanced hot carrier photoluminescence mechanism. The emission spectra of single copper and gold nanocubes are compared, unveiling the synergistic effects of interband transitions and plasmonic enhancement. The excitation wavelength dependent quantum yields are explained by the energy dependent lifetime of d-band holes.en_US
dc.embargo.terms2020-08-01en_US
dc.format.mimetypeapplication/pdfen_US
dc.identifier.citationCai, Yiyu. "Light Emission from Single Plasmonic Nanoparticles." (2019) Diss., Rice University. <a href="https://hdl.handle.net/1911/106163">https://hdl.handle.net/1911/106163</a>.en_US
dc.identifier.urihttps://hdl.handle.net/1911/106163en_US
dc.language.isoengen_US
dc.rightsCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.subjectGold nanoparticleen_US
dc.subjectcopper nanoparticleen_US
dc.subjectquantum yielden_US
dc.subjectsingle-particle spectroscopyen_US
dc.subjectinterband transitionen_US
dc.subjectintraband transitionen_US
dc.subjectanti-Stokes photoluminescenceen_US
dc.subjectStokes photoluminescenceen_US
dc.subjecthot electron temperatureen_US
dc.subjectsurface plasmon resonanceen_US
dc.titleLight Emission from Single Plasmonic Nanoparticlesen_US
dc.typeThesisen_US
dc.type.materialTexten_US
thesis.degree.departmentChemistryen_US
thesis.degree.disciplineNatural Sciencesen_US
thesis.degree.grantorRice Universityen_US
thesis.degree.levelDoctoralen_US
thesis.degree.nameDoctor of Philosophyen_US
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