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Plasmon‐enhanced photoluminescence from TiO 2 :Sm 3+ :Au nanostructure
Author(s) -
An Guofei,
Yang Chaoshun,
Zhou Yawei,
Zhao Xiaopeng
Publication year - 2012
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201228290
Subject(s) - photoluminescence , plasmon , surface plasmon resonance , materials science , nanoparticle , nanostructure , localized surface plasmon , optoelectronics , excited state , surface plasmon , resonance (particle physics) , nanotechnology , atomic physics , physics
In this paper, a novel plasmon‐enhanced photoluminescence (PL) hybrid system is presented based on metal–semiconductor nanostructure, in which TiO 2 :Sm 3+ works as luminophor while the gold nanoparticle (NP) as the promoter of plasmon resonance. The plasmon‐enhanced PL is obtained by optimizing the plasmon resonance peak of gold NP employed in the system, and it is deduced that there is energy transfer from TiO 2 :Sm 3+ to Au NPs during the process of light emitting. When the localized surface plasmon resonance (LSPR) spectra of Au NPs overlap with the PL spectra of TiO 2 :Sm 3+ , the Au NPs absorb the energy transferred from TiO 2 :Sm 3+ , and then the plasmonic mode confined around Au NPs can be excited to bring out the PL enhancement.Schematic illustration of the process of plasmon‐enhanced emission. The different steps are (a) light emitting of TiO 2 :Sm 3+ , (b) energy transferred from TiO 2 :Sm 3+ to the Au NPs, and (c) enhanced emitting of the hybrid system.