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Magneto optics of the spatially separated electron and hole layers in GaAs/AlGaAs coupled quantum wells

被引：1
|
作者：
Butov, LV [1 ]
Imamoglu, A
Shashkin, AA
Dolgopolov, VT
Mintsev, AV
Feklisov, SG
Campman, KL
Gossard, AC
机构：
[1] Russian Acad Sci, Inst Solid State Phys, Chernogolovka 142432, Russia
[2] Univ Calif Santa Barbara, Dept Elect & Comp Engn, Santa Barbara, CA 93106 USA
[3] Univ Calif Santa Barbara, Ctr Quantized Elect Struct, QUEST, Santa Barbara, CA 93106 USA
来源：
PHYSICA E | 2000年 / 6卷 / 1-4期
基金：
美国国家科学基金会; 俄罗斯基础研究基金会;
关键词：
magneto optics; coupled quantum wells;
D O I：
10.1016/S1386-9477(99)00145-9
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
We report on the photoluminescence (PL) study of the spatially separated electron and hole layers in GaAs/AlGaAs coupled quantum wells at low temperatures T greater than or equal to 50 mK. At high magnetic fields cusps are observed in the energy and intensity of the indirect (interwell) exciton FL. We tentatively attribute these to the commensurability effects of the magnetoexciton with island structures in the sample. Strong nonlinearities in the indirect exciton PL kinetics are observed: right after the excitation is switched off, the indirect exciton PL intensity jumps up, and the consequent PL intensity decay rate Increases strongly with excitation density. The effects can be attributed to stimulated exciton scattering to the optically active exciton stares (the boser affect) and exciton superradiance. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：655 / 659
页数：5
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