RELAXATION OF EXCITONS IN THIN QUANTUM-WELLS

被引：49

作者：

ZACHAU, M

KASH, JA

MASSELINK, WT

机构：

[1] IBM Research Division, Thomas J. Watson Research Center, Yorktown Heights

来源：

PHYSICAL REVIEW B | 1991年 / 44卷 / 15期

关键词：

D O I：

10.1103/PhysRevB.44.8403

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Using time-resolved luminescence we measure the energy relaxation of excitons in thin quantum wells. We find that the exciton relaxation in thin wells cannot be explained by the models of exciton relaxation generally used in thick wells. Instead, the excitons relax by losing potential energy in a drift-diffusion motion driven by potential fluctuations in the quantum-well plane, which are longer than the coherence length of the excitons. The well-width dependence of the exciton relaxation and differences between quantum wells with and without growth interruption are discussed.

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页码：8403 / 8406

页数：4

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