Excitonic Photoluminescence in Semiconductor Quantum Wells: Plasma versus Excitons
- 13 February 2004
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 92 (6) , 067402
- https://doi.org/10.1103/physrevlett.92.067402
Abstract
Time-resolved photoluminescence spectra after nonresonant excitation show a distinct 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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