Optical Stark effect on excitons in GaAs quantum wells.
We describe the first reported experimental observation of an extremely fast shift of the n = 1 exciton transition energy in GaAs quantum-well heterostructures. The shift is produced by optical pumping below the band gap and is not associated with a carrier or exciton population. We interpret the shift in terms of an optical Stark effect. We present a model for the Stark effect on the ground-state exciton in quantum wells and find good agreement between the predictions of the model and our experimental results.
Von Lehmen
A
A
Chemla
D S
DS
Zucker
J E
JE
Heritage
J P
JP