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Title:Nonlinear Fourier-transform Spectroscopy Of Single Gold Nanoparticles
Author(s):Steves, Megan A.
Contributor(s):Knappenberger, Jr., Kenneth L.
Subject(s):Fundamental interest
Abstract:Plasmonic metal nanoparticles exhibit strong and tunable light-matter interactions which have enabled a variety of applications. Alongside their strong linear extinction, plasmonic nanoparticles have also been noted for their nonlinear optical properties. Here we present a study of multiphoton absorption in plasmonic gold nanorods using Fourier-transform spectroscopy with nonlinear optical detection. The excitation spectra of single gold nanorods is retrieved from an interferometric multiphoton photoluminescence (MPPL) signal which is generated by a pair of phase-locked pulses with attosecond interpulse delay precision. The resulting Fourier-transform spectra reveal the two- and three-photon excitation pathways that lead to emission from gold nanorods. Investigation of the spectra demonstrates the connection between resonance frequency and nonlinear absorption cross-section in gold nanorods, which is attributed to the influence of gold’s electronic structure.\footnote{This work was supported by the Air Force Office of Scientific Research, grant number FA-9550-18-1-0347, the National Science Foundation Graduate Research Fellowship Program under grant no. DGE1255832 and the National Science Foundation, award number CHE-1807999}
Issue Date:2021-06-22
Publisher:International Symposium on Molecular Spectroscopy
Genre:Conference Paper / Presentation
Date Available in IDEALS:2021-09-24

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