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Enhanced radiative emission rate of CdSe/ZnS quantum dotson semi-continuous gold films

Published online by Cambridge University Press:  28 March 2008

Y.-Y. Zhai ,
H. Song ,
Z.-K. Zhou ,
M. Li  and
Z.-H. Hao
Y.-Y. Zhai
Affiliation:
Department of Physics, Wuhan University, Wuhan 430072, P.R. China
H. Song
Affiliation:
Department of Physics, Wuhan University, Wuhan 430072, P.R. China
Z.-K. Zhou
Affiliation:
Department of Physics, Wuhan University, Wuhan 430072, P.R. China
M. Li
Affiliation:
Department of Physics, Wuhan University, Wuhan 430072, P.R. China
Z.-H. Hao*
Affiliation:
Department of Physics, Wuhan University, Wuhan 430072, P.R. China Key Laboratory of Acoustic and Photonic Materials and Devices of Ministry of Education, Wuhan University, Wuhan 430072, P.R. China
*
[email protected]
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Abstract

We have studied the enhancement of radiative emission rate of CdSe/ZnS core-shell quantum dots on semi-continuous gold films which have been prepared by using sputtering technique. The photoluminescence intensity and the decay rate of CdSe/ZnS quantum dots are affected by the semi-continuous gold films. Both the photoluminescence intensity and the decay rate of the quantum dots are greatly enhanced by the semi-continuous gold films near the conductive percolation threshold and that are caused by the enhanced local electric field due to the surface plasmon resonance on the semi-continuous gold films.

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 42 , Issue 2 , May 2008 , pp. 109 - 112
Copyright
© EDP Sciences, 2008

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