报告人：徐士杰 教授（香港大学物理系 ）    

In this talk, we report an observation of luminescence imaging and   blinking behavior of single indium rich nanoclusters   spontaneously formed inside GaN matrix. At room temperature,   light emissions from individual nanoclusters have been spatially   and spectrally detected using scanning confocal micro-Raman  microscopy/spectroscopy system. Under the continuous excitation   of continuous-wave laser, spectral jump and intensity   intermittence of light emissions from these individual   nanostructures inside solid state environment have been   interestingly observed. The “on” and “off” events in the light emission of individual InGaN nanoclusters have been monitored as a function of time. In order to understand physical mechanism of the blinking behavior, statistical analysis of both “on” and “off” time durations has been performed.

 

徐士杰 教授 简介：

徐士杰，现任香港大学物理系副教授。已在半导体光学及物理和器件领域开展研究工作20年。在半导体自组装量子点及其器件应用上作出几项有重要国际影响的研究工作。在加入香港大学前曾先后在中科院半导体研究所半导体超晶格国家重点实验室、新加坡国立大学等单位工作和学习。

 

 

联系人：金奎娟 研究员 （Tel：82648099）