Exciton lifetime in quantum well with vicinal high-density excitons

被引：2

作者：

Hirasawa, M ^{[1
]}

Ishihara, T ^{[1
]}

机构：

[1] Hiroshima Univ, Fac Engn, Dept Phys Elect, Higashihiroshima 7398527, Japan

来源：

PHYSICA E | 2000年 / 7卷 / 3-4期

关键词：

exciton superradiance; exciton-exciton scattering; quantum well; exciton reservoir;

D O I：

10.1016/S1386-9477(99)00392-6

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Radiative lifetime of an exciton in a GaAs quantum well (QW) is controlled by high-density excitons, which restrict the exciton coherence through scattering. In order to circumvent the phase space filling effect of high-density excitons, we have prepared a QW structure in such a way that a reservoir for high-density excitons is separated from the QW. The lifetime increases (up to 30%) with the exciton density in the reservoir and saturates at 1 x 10(17)/cm(3). The upper bound lifetime is determined by the excitonic relative motion. (C) 2000 Published by Elsevier Science B.V. All rights reserved.

引用

页码：600 / 603

页数：4

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