Optical Asymmetry and Nonlinear Light Scattering from Colloidal Gold Nanorods

ACS Nano
Miao-Bin LienTheodore B Norris

Abstract

A systematic study is presented of the intensity-dependent nonlinear light scattering spectra of gold nanorods under resonant excitation of the longitudinal surface plasmon resonance (SPR). The spectra exhibit features due to coherent second and third harmonic generation as well as a broadband feature that has been previously attributed to multiphoton photoluminescence arising primarily from interband optical transitions in the gold. A detailed study of the spectral dependence of the scaling of the scattered light with excitation intensity shows unexpected scaling behavior of the coherent signals, which is quantitatively accounted for by optically induced damping of the SPR mode through a Fermi liquid model of the electronic scattering. The broadband feature is shown to arise not from luminescence, but from scattering of the second-order longitudinal SPR mode with the electron gas, where efficient excitation of the second order mode arises from an optical asymmetry of the nanorod. The electronic-temperature-dependent plasmon damping and the Fermi-Dirac distribution together determine the intensity dependence of the broadband emission, and the structure-dependent absorption spectrum determines the spectral shape through the fluc...Continue Reading

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Citations

Jul 12, 2019·Chemical Society Reviews·Joanna Olesiak-BanskaMarek Samoc
Mar 1, 2018·Science Advances·Ji-Young KimNicholas A Kotov
Dec 4, 2019·Physical Chemistry Chemical Physics : PCCP·Shan XueQunhui Yuan
Apr 27, 2018·Nanoscale·Lei YanSheng Meng
Apr 28, 2020·ACS Applied Materials & Interfaces·Yu TaoShan Zha
Apr 18, 2020·ACS Applied Materials & Interfaces·Roozbeh Siavash MoakharSara Mahshid

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