Luminescence imaging and blinking behavior of individual InGaN nanoclusters formed in GaN matrix

Abstract

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.