Ultrafast pump-probe dynamics in ZnSe-based semiconductor quantum wells

H. Ouerdane, G. Papageorgiou, I. Galbraith, A. K. Kar, B. S. Wherrett

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Pump-probe experiments are used as a controllable way to investigate the properties of photoexcited semi-conductors, in particular, the absorption saturation. We present an experiment-theory comparison for ZnSe quantum wells, investigating the energy renormalization and bleaching of the excitonic resonances. Experiments were performed with spin-selective excitation and above-bandgap pumping. The model, based on the semiconductor Bloch equations in the screened Hartree-Fock approximation, takes various scattering processes into account phenomenologically. Comparing numerical results with available experimental data, we explain the experimental results and find that the electron spin-flip occurs on a time scale of 30 ps. © 2002 Optical Society of America.

Original languageEnglish
Pages (from-to)2022-2031
Number of pages10
JournalJournal of the Optical Society of America B: Optical Physics
Volume19
Issue number9
Publication statusPublished - Sep 2002

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