EVIDENCE FOR SUPERRADIANT DECAY OF EXCITONS IN INAS QUANTUM SHEETS

被引：26

作者：

BRANDT, O

LAROCCA, GC

HEBERLE, A

RUIZ, A

PLOOG, K

机构：

[1] Max-Planck-Institut F̈r Festkörperforschung

来源：

PHYSICAL REVIEW B | 1992年 / 45卷 / 07期

关键词：

D O I：

10.1103/PhysRevB.45.3803

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Radiative lifetimes are measured for excitons attached to isolated (001) InAs lattice planes interspersed in bulklike GaAs. The broken translational invariance of the system provides an efficient radiative decay channel for excitons. We demonstrate that the radiative lifetime is determined by the spatial extent of areas of continuous In coverage. This dependence directly indicates the superradiant nature of the spontaneous-emission process, since the decay rate is proportional to the area over which the coherent polarization of the exciton extends.

引用

页码：3803 / 3806

页数：4

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