Charged exciton dynamics in GaAs quantum wells
- 15 November 1998
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 58 (19) , 12637-12640
- https://doi.org/10.1103/physrevb.58.12637
Abstract
We study the dynamics of the charged and neutral excitons in a modulation-doped GaAs quantum well by time-resolved photoluminescence under a resonant excitation. The radiative lifetime of the charged exciton is found to be surprisingly short, 60 ps. This time is temperature independent between 2 and 10 K, and increases by a factor of 2 at 6 T. We discuss our findings in view of present theories of exciton radiative decay.Keywords
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