Quantum kinetic influences on electron-phonon scattering in semiconductors

A. Leitenstorfer, C. Fürst, A. Laubereau, R. Zimmermann

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

The dynamics of photoexcited electrons in GaAs due to LO phonon emission is investigated. On an ultrafast timescale energy conservation is seen to be violated and non-Markovian memory effects are observed. Initially, the phonon replica are substantially broadened with respect to the unrelaxed excitation peak. As time proceeds, quantum interference becomes operative resulting in a narrowing of the maxima to the shape expected in the semiclassical limit. The timescale for these phenomena is given by the LO oscillation period. Quantum kinetic simulations based on a simplified model that allows an exact treatment of the memory effects agree with our experimental data.

Original languageEnglish
Pages (from-to)300-302
Number of pages3
JournalPhysica Status Solidi (B) Basic Research
Volume204
Issue number1
DOIs
StatePublished - Nov 1997

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