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Proceedings Paper

Unifying model for giant enhancement and quenching of light emission from Au/CdSe nanocomposites
Author(s): Ya-Ping Hsieh; Ji-Wei Chen; Chi-Te Liang; Yang-Fang Chen; Chih-Wei Lai; Pi-Tai Chou
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Paper Abstract

A unifying model based on enhanced elctron-hole recombination rate generated by surface plasmon (SP) waves of Au nanoparticles (NPs), electrons transferred from the CdSe quantum dots (QDs) to the Au NPs, as well as the photoexcitation wavelength is proposed to explain the observed optical enhancement and quenching from Au and CdSe nanocomposites. In our system, the photoluminescence-enhancement ratio can be manipulated to ~130, the largest value ever reported. Our experimental results clarify the ambiguity in controlling the light emission enhancement of semiconductor nanocrystals which are coupled with the SP waves of metal NPs.

Paper Details

Date Published: 25 September 2007
PDF: 9 pages
Proc. SPIE 6641, Plasmonics: Metallic Nanostructures and Their Optical Properties V, 66411C (25 September 2007); doi: 10.1117/12.729228
Show Author Affiliations
Ya-Ping Hsieh, National Taiwan Univ. (Taiwan)
Ji-Wei Chen, National Taiwan Univ. (Taiwan)
Chi-Te Liang, National Taiwan Univ. (Taiwan)
Yang-Fang Chen, National Taiwan Univ. (Taiwan)
Chih-Wei Lai, National Taiwan Univ. (Taiwan)
Pi-Tai Chou, National Taiwan Univ. (Taiwan)

Published in SPIE Proceedings Vol. 6641:
Plasmonics: Metallic Nanostructures and Their Optical Properties V
Mark I. Stockman, Editor(s)

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