Abstract
Exciton spin relaxation in self-assembled InAlAs quantum dots were investigated by three-pulse four-wave mixing under resonant conditions. The concept of the spin grating holds well for quantum dots and the measurements combined with optical heterodyne detection at 10 K demonstrates that the exciton spin relaxation last up to a few ns and the time constant is ∼5 times larger than the exciton recombination time in average. (© 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
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