Abstract

Dynamics of free and bound excitons in CdSe and localized excitons in CdSexS1−x are studied by degenerate four-wave mixing and light-induced grating experiments. In the coherent range, the dephasing of excitons is determined as a function of temperature, density and energy. For incoherent excitons, recombination lifetimes and diffusion coefficients are determined. In particular, the mobility of excitons in CdSexS1−x near the mobility edge is studied.

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