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Title: Plasmon-modulated photoluminescence of individual gold nanostructures
Authors: Hu, Hailong
Duan, Huigao
Shen, Zexiang
Yang, Joel K. W.
Issue Date: 2012
Source: Hu, H., Duan, H., Yang, J. K. W., & Shen, Z. (2012). Plasmon-modulated photoluminescence of individual gold nanostructures. ACS nano, 6(11), 10147-10155.
Series/Report no.: ACS nano
Abstract: In this work, we performed a systematic study on the photoluminescence and scattering spectra of individual gold nanostructures that were lithographically defined. We identify the role of plasmons in photoluminescence as modulating the energy transfer between excited electrons and emitted photons. By comparing photoluminescence spectra with scattering spectra, we observed that the photoluminescence of individual gold nanostructures showed the same dependencies on shape, size, and plasmon coupling as the particle plasmon resonances. Our results provide conclusive evidence that the photoluminescence in gold nanostructures indeed occurs via radiative damping of plasmon resonances driven by excited electrons in the metal itself. Moreover, we provide new insight on the underlying mechanism based on our analysis of a reproducible blue shift of the photoluminescence peak (relative to the scattering peak) and observation of an incomplete depolarization of the photoluminescence.
ISSN: 1936-0851
DOI: 10.1021/nn3039066
Rights: © 2012 American Chemical Society.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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