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.
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页码：12658 / 12661
页数：4
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