Transient strain driven by a dense electron-hole plasma

DeCamp, Matthew F.; Reis, David A.; Cavalieri, A; Bucksbaum, Philip H.; Clarke, Roy; Merlin, Roberto; Dufresne, E. M.; Arms, D. A.; Lindenberg, Aaron M.; MacPhee, A. G.; Chang, Zenghu; Lings, B.; Wark, Justin S.; Fahy, Stephen B.

Transient strain driven by a dense electron-hole plasma

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Published Version

Date

2003

Authors

DeCamp, Matthew F.

Reis, David A.

Cavalieri, A

Bucksbaum, Philip H.

Clarke, Roy

Merlin, Roberto

Dufresne, E. M.

Arms, D. A.

Lindenberg, Aaron M.

MacPhee, A. G.

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Publisher

American Physical Society

Published Version

10.1103/PhysRevLett.91.165502

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.

Keywords

X-ray diffraction , Picosecond light pulses , Lattice dynamics , Generation , Germanium , Disorder , Surfaces , Crystals , Phonons

Citation

DeCamp, M. F., Reis, D. A., Cavalieri, A., Bucksbaum, P. H., Clarke, R., Merlin, R., Dufresne, E. M., Arms, D. A., Lindenberg, A. M., MacPhee, A. G., Chang, Z., Lings, B., Wark, J. S. and Fahy, S. (2003) 'Transient strain driven by a dense electron-hole plasma', Physical Review Letters, 91(16), 165502 (4pp). doi: 10.1103/PhysRevLett.91.165502