Abstract
We directly resolve the femtosecond free-induction decay of excitons in GaAs quantum wells at room temperature by upconverting the diffracted signal from a transient four-wave-mixing experiment. At high laser intensities, we find significant deviations from the temporal evolution of the time-integrated and peak amplitude signals, which we attribute to many-body Coulomb effects.
Original language | English |
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Pages (from-to) | 2666-2668 |
Number of pages | 3 |
Journal | Applied Physics Letters |
Volume | 60 |
Issue number | 21 |
DOIs | |
State | Published - 1992 |
Externally published | Yes |