Supersonic strain front driven by a dense electron-hole plasma
Materials Science
2009-11-10 v1
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.
Cite
@article{arxiv.cond-mat/0301002,
title = {Supersonic strain front driven by a dense electron-hole plasma},
author = {M. F. DeCamp and D. A. Reis and A. Cavalieri and P. H. Bucksbaum and R. Clarke and R. Merlin and E. M. Dufresne and D. A. Arms and A. M. Lindenberg and A. G. MacPhee and Z. Chang and B. Lings and J. S. Wark and S. Fahy},
journal= {arXiv preprint arXiv:cond-mat/0301002},
year = {2009}
}
Comments
4 pages, 6 figures