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Excitonic photoluminescence in semiconductor quantum wells: Plasma versus excitons

被引：94
作者：
Chatterjee, S [1 ]
Ell, C
Mosor, S
Khitrova, G
Gibbs, HM
Hoyer, W
Kira, M
Koch, SW
Prineas, JP
Stolz, H
机构：
[1] Univ Arizona, Ctr Opt Sci, Tucson, AZ 85721 USA
[2] Univ Marburg, Dept Phys, D-35032 Marburg, Germany
[3] Univ Marburg, Ctr Mat Sci, D-35032 Marburg, Germany
[4] Univ Iowa, Dept Phys & Astron, Iowa City, IA 52242 USA
[5] Univ Rostock, Dept Phys, D-18051 Rostock, Germany
来源：
PHYSICAL REVIEW LETTERS | 2004年 / 92卷 / 06期
关键词：
D O I：
10.1103/PhysRevLett.92.067402
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Time-resolved photoluminescence spectra after nonresonant excitation show a distinct 1s resonance, independent of the existence of bound excitons. A microscopic analysis identifies exciton and electron-hole plasma contributions. For low temperatures and low densities, the excitonic emission is extremely sensitive to details of the electron-hole-pair population making it possible to identify even minute fractions of optically active excitons.
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页数：4
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