PHOTOINDUCED INTERSUBBAND ABSORPTION IN NORMAL-DOPED QUANTUM-WELLS

被引:0
|
作者
GARINI, Y [1 ]
COHEN, E [1 ]
RON, A [1 ]
EHRENFREUND, E [1 ]
LAW, KK [1 ]
MERZ, JL [1 ]
GOSSARD, AC [1 ]
机构
[1] UNIV CALIF SANTA BARBARA,CTR QUANTIZED ELECTR STRUCT QUEST,SANTA BARBARA,CA 93106
基金
美国国家科学基金会;
关键词
D O I
10.1016/0022-2313(92)90158-6
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We report on the study of Si-doped GaAs/AlGaAs narrow multiquantum wells (MQWs) using the intersubband photoinduced absorption technique. For the barrier-doped MQWs, we find that an impurity level which is approximately 60 meV below the barrier band gap, causes a photoinduced reduction ("bleaching") in the e1-e2 intersubband absorption. This is not observed for the MQWs doped in the well. For a Si-doped level of approximately 2.5 X 10(16) cm-3 (in the barriers), we estimate the density of the impurities causing the bleaching to be of the order of 2 X 10(8) cm-2 per barrier.
引用
收藏
页码:288 / 292
页数:5
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