Imaging spectroscopy of two-dimensional excitons in a narrow GaAs/AlGaAs quantum well

被引：102

作者：

Wu, Q ^{[1
]}

Grober, RD

Gammon, D

Katzer, DS

机构：

[1] Yale Univ, Dept Appl Phys, New Haven, CT 06520 USA

[2] USN, Res Lab, Washington, DC 20375 USA

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 83卷 / 13期

关键词：

D O I：

10.1103/PhysRevLett.83.2652

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the observation of a sharp absorption line in the photoluminescence excitation spectra of individual naturally occurring quantum dots in a narrow (2.8 nm) GaAs/Al0.3Ga0.7As quantum well that is remarkably constant throughout the sample. We propose that it is identified as the delocalized two-dimensional exciton. This assignment is confirmed by photoluminescence and photoluminescence excitation diffusion experiments.

引用

页码：2652 / 2655

页数：4

共 26 条

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