The European Physical Journal Applied Physics (EPJ AP)

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Eur. Phys. J. Appl. Phys. 42, 109-112 (2008)
DOI: 10.1051/epjap:2008032

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

Y.-Y. Zhai¹, H. Song¹, Z.-K. Zhou¹, M. Li¹ and Z.-H. Hao^{1, 2}

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

zhhao@whu.edu.cn

(Received: 21 August 2007 / Received in final form: 7 December 2007 / Accepted: 21 January 2008 / Published online: 28 March 2008)

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.