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Title: Surface plasmon enhanced photoluminescence from copper nanoparticles: Influence of temperature

Anomalous temperature dependence of surface plasmon enhanced photoluminescence from copper nanoparticles embedded in a silica host matrix has been observed. The quantum yield of photoluminescence increases as the temperature increases. The key role of such an effect is the interplay between the surface plasmon resonance and the interband transitions in the copper nanoparticles occurring at change of the temperature. Namely, the increase of temperature leads to the red shift of the resonance. The shift leads to increase of the spectral overlap of the resonance with photoluminescence band of copper as well as to the decrease of plasmon damping caused by interband transitions. Such mechanisms lead to the increase of surface plasmon enhancement factor and, consequently, to increase of the quantum yield of the photoluminescence.
Authors:
; ;  [1]
  1. Physics Department, Taras Shevchenko National University of Kyiv, 64/13 Volodymyrs'ka St., 01601 Kyiv (Ukraine)
Publication Date:
OSTI Identifier:
22314705
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 116; Journal Issue: 5; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COPPER; DAMPING; ENERGY-LEVEL TRANSITIONS; NANOPARTICLES; PHOTOLUMINESCENCE; RED SHIFT; SILICA; SURFACES; TEMPERATURE DEPENDENCE; YIELDS