Luminescence quantum yields of gold nanoparticles varying with excitation wavelength

Yuqing Cheng, Yingbo He, Jingyi Zhao, Hongming Shen, Keyu Xia, Guowei Lua, Qihuang Gong

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution

Abstract

Luminescence quantum yields (QYs) of gold nanoparticles including nanorods, nanobipyramids and nanospheres are measured elaborately at single nanoparticle level with different excitation wavelengths. It is found that the QYs of the nanostructures are essentially dependent on the excitation wavelength. The QY is higher when the excitation wavelength is blue-detuned and close to the nanoparticles' surface plasmon resonant peak. A phenomenological model based on plasmonic resonator concept is proposed to understand the experimental findings. The excitation wavelength dependent of QY is attributed to the wavelength dependent coupling efficiency between the free electrons oscillation and the intrinsic plasmon resonant radiative mode. These studies should contribute to the understanding of one-photon luminescence from metallic nanostructures and plasmonic surface enhanced spectroscopy.

Original languageEnglish
Title of host publicationNanophotonics and Micro/Nano Optics III
EditorsZhiping Zhou, Kazumi Wada
Place of PublicationBellingham, Washington
PublisherSPIE
Pages1-9
Number of pages9
ISBN (Electronic)9781510604742
ISBN (Print)9781510604735
DOIs
Publication statusPublished - 2016
EventNanophotonics and Micro/Nano Optics III - Beijing, China
Duration: 12 Oct 201614 Oct 2016

Publication series

NameProceedings of SPIE
PublisherSPIE
Volume10027
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Other

OtherNanophotonics and Micro/Nano Optics III
CountryChina
CityBeijing
Period12/10/1614/10/16

Keywords

  • Gold nanoparticles
  • Luminescence quantum yields
  • Photothermal
  • Plasmon

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  • Cite this

    Cheng, Y., He, Y., Zhao, J., Shen, H., Xia, K., Lua, G., & Gong, Q. (2016). Luminescence quantum yields of gold nanoparticles varying with excitation wavelength. In Z. Zhou, & K. Wada (Eds.), Nanophotonics and Micro/Nano Optics III (pp. 1-9). [1002715] (Proceedings of SPIE; Vol. 10027). Bellingham, Washington: SPIE. https://doi.org/10.1117/12.2244283