Origin of the Avalanche-Like Photoluminescence from Metallic Nanowires

Surface plasmonic systems provide extremely efficient ways to modulate light-matter interaction in photon emission, light harvesting, energy conversion and transferring, etc. Various surface plasmon enhanced luminescent behaviors have been observed and investigated in these systems. But the origin o...

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Bibliographic Details
Published in:Scientific reports 2016-01, Vol.6 (1), p.18857-18857, Article 18857
Main Authors: Ma, Zongwei, Yu, Ying, Shen, Shaoxin, Dai, Hongwei, Yao, Linhua, Han, Yibo, Wang, Xia, Han, Jun-Bo, Li, Liang
Format: Article
Language:English
Subjects:
639/301/1019/1021
639/624/400/1021
Behavior
Energy conversion
Humanities and Social Sciences
Investigations
Lasers
Light
Luminescence
Monomers
multidisciplinary
Nanotechnology
Nanowires
Photons
Physics
Radiation
Scanning electron microscopy
Science
Spectrum analysis
Thermal radiation
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Summary:Surface plasmonic systems provide extremely efficient ways to modulate light-matter interaction in photon emission, light harvesting, energy conversion and transferring, etc. Various surface plasmon enhanced luminescent behaviors have been observed and investigated in these systems. But the origin of an avalanche-like photoluminescence, which was firstly reported in 2007 from Au and subsequently from Ag nanowire arrays/monomers, is still not clear. Here we show, based on systematic investigations including the excitation power/time related photoluminescent measurements as well as calculations, that this avalanche-like photoluminescence is in fact a result of surface plasmon assisted thermal radiation. Nearly all of the related observations could be perfectly interpreted with this concept. Our finding is crucial for understanding the surface plasmon mediated thermal and photoemission behaviors in plasmonic structures, which is of great importance in designing functional plasmonic devices.
ISSN:2045-2322
2045-2322
DOI:10.1038/srep18857