Abstract
Carrier capture times are calculated for GaAs-AlxGa1−xAs multiple quantum wells due to the emission of confined longitudinal optical phonons via electron-phonon (Fröhlich) interaction. We compare our results with several capture times measured by optical techniques and we discuss the importance of a knowledge of the carrier excitation details in order to obtain an appropriate interpretation of the experimental results. We show that electrons excited into confined states with a large kinetic energy (which have been ignored in previous works) strongly influence the overall capture times.
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