Spectroscopy of excitonic Zeeman levels in single quantum dots

被引：4

作者：

Schaller, A ^{[1
]}

Zrenner, A ^{[1
]}

Abstreiter, G ^{[1
]}

Bohm, G ^{[1
]}

机构：

[1] Tech Univ Munich, Walter Schottky Inst, D-85748 Garching, Germany

来源：

PHYSICA E | 1998年 / 2卷 / 1-4期

关键词：

quantum dots; coupled quantum wells; Zeeman effect; g-factor;

D O I：

10.1016/S1386-9477(98)00124-6

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Fully confined excitons are investigated in natural quantum dots, which are formed by well-width fluctuations in GaAs/AlAs coupled quantum-well structures. In magnetooptic experiments a population inversion of the Zeeman split levels in the quantum dots is found under the condition of charge injection from the AlAs X-point state. This new phenomenon is explained in terms of spin thermalization in the intermediate indirect exciton state and subsequent tunnelling into the direct quantum-dot state. Population inversion is thereby caused by the associated sign reversal of the effective exciton g-factor. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：609 / 613

页数：5

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