Charged exciton dynamics in GaAs quantum wells

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. [S0163-1829(98)03143-9].


Published in:
Physical Review B, 58, 19, 12637-12640
Year:
1998
ISSN:
1098-0121
Note:
Weizmann Inst Sci, Dept Condensed Matter Phys, IL-76100 Rehovot, Israel. Swiss Fed Inst Technol, Dept Phys, Inst Micro & Optoelect, CH-1015 Lausanne, Switzerland. Finkelstein, G, Weizmann Inst Sci, Dept Condensed Matter Phys, IL-76100 Rehovot, Israel.
ISI Document Delivery No.: 144CE
Times Cited: 48
Cited Reference Count: 18
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