Abstract
Using polarization-resolved photoluminescence imaging in external magnetic fields we measurestatistically significant distributions of exchange splitting, diamagnetic shift and effectiveg-factor of excitons in tens of single CdTe quantum dots. Comparison between the as-grownand annealed structures shows strong suppression of ensemble inhomogeneities, withthe average exchange splitting reduced by half and significant narrowing of theg-factor distribution. Remarkably, the average value of the excitonicg-factor remains unchanged. This unique ability to yield highly uniform quantum dotensembles without hampering the exciton Zeeman splitting makes annealing ahighly attractive means for tuning the spin properties of quantum dot excitons.
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