Excitonic photoluminescence in semiconductor quantum wells: plasma versus excitons

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 extre...

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Bibliographic Details
Published in:Physical review letters 2004-02, Vol.92 (6), p.067402-067402, Article 067402
Main Authors: Chatterjee, S, Ell, C, Mosor, S, Khitrova, G, Gibbs, H M, Hoyer, W, Kira, M, Koch, S W, Prineas, J P, Stolz, H
Format: Article
Language:English
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Summary: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.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.92.067402