THE EFFECTS OF PHOTOEXCITED FREE-CARRIERS ON EXCITON DYNAMICS IN GAAS/ALGAAS QUANTUM-WELLS

被引：0
|
作者：
ASHKINADZE, BM [1 ]
COHEN, E [1 ]
RON, A [1 ]
LINDER, E [1 ]
PFEIFFER, LN [1 ]
机构：
[1] AT&T BELL LABS,MURRAY HILL,NJ 07974
来源：
SUPERLATTICES AND MICROSTRUCTURES | 1994年 / 15卷 / 02期
关键词：
D O I：
10.1006/spmi.1994.1036
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We report on the effect of photogenerated free carriers on the spectral diffusion and on the LO-phonon Raman scattering of resonantly excited excitons. This is observed by an exciton population redistribution between localized states and by a decrease in the Raman scattering intensity under an extremely weak, additional, above bandgap excitation. We interpret these effects by a new channel for exciton transfer induced by free carrier -exciton scattering that adds up to the phonon assisted exciton tunneling between the states that arise from interface roughness.
引用
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页码：179 / 182
页数：4
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