2004/09/20 by S. Mackowski, T. Gurung, H. E. Jackson +4
Materials Science · Physics and Astronomy · #Quantum Dots Synthesis And Properties #Quantum and electron transport phenomena #Semiconductor Quantum Structures and Devices #cond-mat.mtrl-sci
paper · pdf · doi:10.1063/1.1875763
13 pages, submitted for publication
arxiv created 2004/09/20 · openalex publication_date 2005/02/28 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We observe a strong dependence of the exciton spin relaxation in CdTe quantum dots on the average dot size and the depth of the confining potential. After rapid thermal annealing, which increases the average dot size and leads to weaker confinement, we measure the spin relaxation time of the quantum dot excitons to be 1.5ns, as compared to 4.8ns found previously for the as-grown CdTe quantum dots. The annealed CdTe quantum dots exhibit also smaller values of the absolute polarization of the quantum dot emission. This dramatic enhancement of the spin scattering efficiency upon annealing is attributed to increased mixing between different spin states in larger CdTe quantum dots.