Open AccessSpectral shape of one-photon luminescence from single gold nanorods
Author(s) -
Te Wen,
Yingbo He,
XueLu Liu,
MiaoLing Lin,
Yuqing Cheng,
Jingyi Zhao,
Qihuang Gong,
Keyu Xia,
PingHeng Tan,
Guowei Lü
Publication year - 2017
Publication title -
aip advances
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.421
H-Index - 58
ISSN - 2158-3226
DOI - 10.1063/1.5008544
Subject(s) - nanorod , spectral line shape , spectral shape analysis , plasmon , emission spectrum , spectral power distribution , stokes shift , excitation , surface plasmon resonance , molecular physics , materials science , spectral width , surface plasmon , resonance (particle physics) , luminescence , wavelength , atomic physics , optics , physics , spectral line , nanoparticle , nanotechnology , quantum mechanics , astronomy
Light emission from gold nanoparticles was investigated with ultra-narrow-band notch filters to obtain the complete spectral shape. The anti-Stokes emission band was observed at all excitation wavelengths. The spectral shape of the anti-Stokes emission could be well fitted by a Fermi–Dirac-like line shape, while the spectral profile of the Stokes emission could be fitted by a Lorentzian line shape. The electron distribution and local surface plasmon resonance jointly determined the spectral shape. Additionally, we found that the anti-Stokes emission intensity increased more rapidly compared with that of the Stokes emission as illumination power was increased. This phenomenon can be understood from the temperature dependence of the electron distribution owing to photothermal effects
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