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We observe a strong dependence of the exciton spin relaxation in CdTe quantumdots on the average dot size and the depth of the confining potential. For theexcitons confined to the as-grown CdTe quantum dots we find the spin relaxationtime to be 4.8 ns. After rapid thermal annealing, which increases the averagedot size and leads to weaker confinement, we measure the spin relaxation tineto be 1.5 ns, resulting in smaller values of the absolute polarization of thequantum dot emission. This dramatic enhancement of the spin scatteringefficiency upon annealing is attributed to increased mixing between differentspin states in larger CdTe quantum dots.Comment: 13 pages, submitted for publicatio

Sensitivity of exciton spin relaxation in quantum dots to confining potential