The influence of electron-phonon scattering on the spatio-temporal dynamics of electronic wavepackets in semiconductor quantum wells

F. Steininger, A. Knorr, P. Thomas, S. W. Koch

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

The dynamic evolution of spatially inhomogeneous electronic excitations coupled to a phonon reservoir is investigated on ultrashort time scales. For this purpose, the in-plane propagation of an optically excited electron-hole density profile is studied in an idealized semiconductor quantum well with equal electron and hole masses. Assuming low density and excitation pulses localized on a micron scale, it is shown that the optically induced electron transport exhibits a crossover from ballistic to diffusive motion depending on the details of the electron-phonon coupling.

Original languageEnglish (US)
Pages (from-to)45-52
Number of pages8
JournalZeitschrift fur Physik B-Condensed Matter
Volume103
Issue number1
DOIs
StatePublished - Jan 1 1997

ASJC Scopus subject areas

  • Condensed Matter Physics

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