SPIN RELAXATION AND THERMALIZATION OF EXCITONS IN GAAS QUANTUM-WELLS

被引：95
|
作者：
DAMEN, TC
LEO, K
SHAH, J
CUNNINGHAM, JE
机构：
[1] AT and T Bell Laboratories, Holmdel
来源：
APPLIED PHYSICS LETTERS | 1991年 / 58卷 / 17期
关键词：
D O I：
10.1063/1.105068
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We present results on the picosecond dynamics of spin relaxation and thermalization of excitons in GaAs quantum wells. The spin relaxation time constant is almost-equal-to 50 ps for resonant excitation and less than 10 ps for nonresonant excitation, considerably shorter than those for free electrons in the bulk. Photoexcited cold, nonthermal excitons thermalize in almost-equal-to 50 ps at 10 K and less than 10 ps at 35 K. Exciton-acoustic phonon energy exchange rates are determined from these measurements.
引用
收藏
页码：1902 / 1904
页数：3
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