μ-PL characterization of CdSe Quantum Dots grown on a Zn_0.2Mg_0.8S_0.64Se_0.36 barrier

In this paper we report on the growth and characterisation of CdSe quantum dots grown by MBE on a MgS-rich ZnMgSSe barrier and characterized by 77K PL and 4K μ-PL. The dot density was estimated to be approximately 10¹⁰ cm⁻² however some emission lines were sufficiently well resolved to investigate their behaviour individually; their emission was observed to change both in intensity and energy, showing a high frequency random jittering. Correlation of the dot intensity over much longer time periods (~200s) was also observed. These results will be compared with previous results from CdSe dots grown on ZnSe barriers.