ROLE OF GROWTH TEMPERATURE IN GSMBE GROWTH OF STRAINED-LAYER INGAAS/GAAS QUANTUM-WELL LASERS

被引:7
作者
ZHANG, G
OVTCHINNIKOV, A
PESSA, M
机构
[1] Department of Physics, Tampere University of Technology, SF-33101 Tampere
基金
芬兰科学院;
关键词
D O I
10.1016/0022-0248(93)90606-W
中图分类号
O7 [晶体学];
学科分类号
0702 ; 070205 ; 0703 ; 080501 ;
摘要
Strained-layer InGaAs/GaAs single quantum well lasers were grown by gas-source molecular-beam epitaxy at growth temperatures in a range of 430 to 610-degrees-C. The optimum growth temperature for the quantum well of the lasers was found to be about 520-degrees-C. If the growth temperature is lower than this value, the threshold current density dramatically increases due to the presence of a high density of non-radiative carrier recombination centers in the quantum well, which give rise to alloy disordering and lattice mismatch defects in the quantum well. If the growth temperature is higher than 520-degrees-C, indium evaporation and segregation become severe during the growth of the quantum well. Thus, the InGaAs/GaAs interfaces become Tough and the threshold current density degrades. In addition, room-temperature photoluminescence was investigated for the samples in detail to clarify the quality of the quantum well.
引用
收藏
页码:209 / 212
页数:4
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