Effects of the morphology of ZnO/Ag interface on the surface-plasmon-enhanced emission of ZnO films

The effects of the surface morphology of Ag on the surface-plasmon-enhanced emission of ZnO films have been studied for a ZnO/Ag/Si system by photoluminescence spectroscopy and atomic force microscopy. The results indicate that the enhancement of ZnO ultraviolet emission is dependent on the deposition conditions of the Ag interlayers. By examining the dependence of the enhancement ratio of surface-plasmon-mediated emission on the characteristic parameters of Ag surface morphology, we found that the surface plasmon coupling to light is determined by both the Ag particle size and density.

Hundred Talents Program Chinese Academy of Sciences 2006AA03Z306 National Natural Science Foundation of China 50601025 This work was supported by the Hundred Talents Program Chinese Academy of Sciences, the '863' Project of China (2006AA03Z306) and the National Natural Science Foundation of China (50601025).