STIMULATED-PICOSECOND-PHOTON-ECHO STUDIES OF LOCALIZED EXCITON RELAXATION AND DEPHASING IN GAAS/ALXGA1-XAS MULTIPLE QUANTUM-WELLS

被引：50
|
作者：
WEBB, MD
CUNDIFF, ST
STEEL, DG
机构：
[1] The Harrison M. Randall Laboratory of Physics, The University of Michigan, Ann Arbor
来源：
PHYSICAL REVIEW B | 1991年 / 43卷 / 15期
关键词：
D O I：
10.1103/PhysRevB.43.12658
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We report measurements of the dynamics of localized excitons in GaAs/AlxGa1-xAs multiple-quantum-well structures at low temperature based on stimulated-picosecond-photon-echo measurements. The results show that at low temperature excitons relax by phonon-assisted migration between localization sites and at higher temperatures are thermally activated to delocalized states. The measurements confirm recent theoretical predictions, but show the unexpected presence of additional dephasing.
引用
收藏
页码：12658 / 12661
页数：4
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