ENHANCED RADIATIVE RECOMBINATION OF FREE-EXCITONS IN GAAS QUANTUM-WELLS

被引：5
作者：
DEVEAUD, B
CLEROT, F
ROY, N
SERMAGE, B
KATZER, DS
机构：
[1] CTR NATL ETUD TELECOMMUN,F-92120 BAGNEUX,FRANCE
[2] USN,RES LAB,WASHINGTON,DC 20375
来源：
SURFACE SCIENCE | 1992年 / 263卷 / 1-3期
关键词：
D O I：
10.1016/0039-6028(92)90395-M
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Radiative properties of free excitons in a single GaAs quantum well are studied under resonant excitation. Superradiant decay of the excitons is evidenced by the very short lifetime as well as by the strong intensity of the signal. Dephasing mechanisms, by destroying the phase coherence of the excitons, increase the observed lifetime. Quantitative agreement between the lifetime, the intensity and the homogeneous broadening is obtained. We deduce a radiative lifetime of 8 ps in the absence of dephasing mechanisms.
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收藏
页码：491 / 495
页数：5
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