Transient Strain Driven by a Dense Electron-Hole Plasma

M. F. DeCamp, D. A. Reis, A. Cavalieri, P. H. Bucksbaum, R. Clarke, R. Merlin, E. M. Dufresne, D. A. Arms, A. M. Lindenberg, A. G. MacPhee, Z. Chang, B. Lings, J. S. Wark, and S. Fahy
Phys. Rev. Lett. 91, 165502 – Published 16 October 2003

Abstract

We measure transient strain in ultrafast laser-excited Ge by time-resolved x-ray anomalous transmission. The development of the coherent strain pulse is dominated by rapid ambipolar diffusion. This pulse extends considerably longer than the laser penetration depth because the plasma initially propagates faster than the acoustic modes. X-ray diffraction simulations are in agreement with the observed dynamics.

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  • Received 31 December 2002

DOI:https://doi.org/10.1103/PhysRevLett.91.165502

©2003 American Physical Society

Authors & Affiliations

M. F. DeCamp1, D. A. Reis1, A. Cavalieri1, P. H. Bucksbaum1, R. Clarke1, R. Merlin1, E. M. Dufresne1, D. A. Arms1, A. M. Lindenberg2, A. G. MacPhee2, Z. Chang3, B. Lings4, J. S. Wark4, and S. Fahy5

  • 1FOCUS Center and Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA
  • 2Department of Physics, University of California, Berkeley, California 98720, USA
  • 3Department of Physics, Kansas State University, Manhattan, Kansas 66506, USA
  • 4Department of Physics, Clarendon Laboratory, University of Oxford, Oxford, OX1 3PU, United Kingdom
  • 5Physics Department and NMRC, University College, Cork, Ireland

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Vol. 91, Iss. 16 — 17 October 2003

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