https://doi.org/10.1051/epjap:2008032
Enhanced radiative emission rate of CdSe/ZnS quantum dots on semi-continuous gold films
1
Department of Physics, Wuhan University, Wuhan 430072, P.R. China
2
Key Laboratory of Acoustic and Photonic Materials and Devices of Ministry of Education, Wuhan University, Wuhan 430072, P.R. China
Corresponding author: zhhao@whu.edu.cn
Received:
21
August
2007
Revised:
7
December
2007
Accepted:
21
January
2008
Published online:
28
March
2008
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.
PACS: 78.55.-m – Photoluminescence, properties and materials / 78.67.Hc – Quantum dots
© EDP Sciences, 2008
