Abstract
Excitonic nonlinearity in multiple quantum wells due to many-body interactions consisting of phase-space filling and screened Coulomb interaction is investigated. In particular, we show that the effects of the screened Coulomb interaction and the phase-space filling on the exciton bleaching can be separated for highly excited carrier densities by femtosecond pump pulses. We also find that the phase-space filling effects on the excitonic bleaching are about three times larger than the effects of screened Coulomb interaction and gradually decreases with increasing carrier density within the Mott density.
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