Abstract
Femtosecond time-resolved and quasi-cw measurements of optical nonlinearities of type-II GaAs/AlAs quantum wells are reported. A pronounced blueshift of the heavy-hole exciton is observed, which develops on a 100-ps time scale after resonant interband excitation. The experimental observations are analyzed using many-body theory, explaining exciton blueshift and dynamical evolution in terms of electron-hole Coulomb enhancement, hole-phase-space filling, and hole-plasma cooling.
Original language | English |
---|---|
Pages (from-to) | 1358-1361 |
Number of pages | 4 |
Journal | Physical Review Letters |
Volume | 66 |
Issue number | 10 |
DOIs | |
Publication status | Published - 11 Mar 1991 |