Excitonic Photoluminescence in Semiconductor Quantum Wells: Plasma versus Excitons

Details Excitonic Photoluminescence in Semiconductor Quantum Wells: Plasma versus Excitons Excitonic Photoluminescence in Semiconductor Quantum Wells: Plasma versus Excitons

2003-09-05

arxiv.org/abs/cond-mat/0309160v1

Phys. Rev. Lett. 92, 067402 (2004)

Physics

Condensed Matter

9 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.92.067402

Time-resolved photoluminescence spectra after nonresonant excitation show a distinct 1s resonance, independent of the existence of bound excitons. A microscopic analysis identifies excitonic and electron-hole plasma contributions. For low temperatures and low densities the excitonic emission is extremely sensitive to even minute optically active exciton populations making it possible to extract a phase diagram for incoherent excitonic populations.

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