Supersonic strain front driven by a dense electron-hole plasma

Preprint

31 December 2002

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/0301002

Abstract

We study coherent strain in (001) Ge generated by an ultrafast laser-initiated high density electron-hole plasma. The resultant coherent pulse is probed by time-resolved x-ray diffraction through changes in the anomalous transmission. The acoustic pulse front is driven by ambipolar diffusion of the electron-hole plasma and propagates into the crystal at supersonic speeds. Simulations of the strain including electron-phonon coupling, modified by carrier diffusion and Auger recombination, are in good agreement with the observed dynamics.

Keywords

ELECTRON HOLE PLASMA
ULTRAFAST LASER
RECOMBINATION
FRONT DRIVEN
HOLE PLASMA
SUPERSONIC
DIFFUSION
AUGER

All Related Versions

Version 1, 2002-12-31, ArXiv
Published version: Physical Review Letters, 91 (16), 165502.

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