EFFICIENT MODULATION OF CARRIER DENSITY IN NOVEL DOUBLE-QUANTUM-WELL STRUCTURE BY LOW OPTICAL PUMP POWER

被引：0
|
作者：
RUFENACHT, M
AKIYAMA, H
TSUJINO, S
KADOYA, Y
SAKAKI, H
机构：
来源：
COMPOUND SEMICONDUCTORS 1994 | 1995年 / 141期
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中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
We demonstrate that the density of carriers con be efficiently modulated by low cw pump power I-EXC when a novel GaAs/GaAlAs double quantum well structure is used to separate photoexcited electron-hole pairs into different quantum wells. A separated carrier density N-SC=1.4*10(11) carriers cm(-2) was found at a pump power I-EXC=250mWcm(-2). This was studied via the photoluminescence peak position which is very sensitive to the carrier density. Detailed measurements revealed the efficiency of carrier separation epsilon(CS)approximate to 20c/c and the separated carrier lifetime tau(SC)=2.3 mu s.
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页码：841 / 844
页数：4
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