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Phys. Rev. Lett. 86, 3072 - 3075 (2001)

Probing Impulsive Strain Propagation with X-Ray Pulses

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D. A. Reis1,2, M. F. DeCamp1, P. H. Bucksbaum1,2, R. Clarke1, E. Dufresne1, M. Hertlein1, R. Merlin1,2, R. Falcone3, H. Kapteyn4, M. M. Murnane4, J. Larsson5, Th. Missalla5, and J. S. Wark6
1Department of Physics, University of Michigan, Ann Arbor, Michigan 48109-1120
2Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109-2099
3Department of Physics, University of California, Berkeley, California 94720-7300
4JILA and Department of Physics, University of Colorado and National Institute of Standards and Technology, Campus Box 440, Boulder, Colorado 80309-0440
5Atomic Physics Division, Lund Institute of Technology, P. O. Box 118, SE-221 00, Lund, Sweden
6Department of Physics, Clarendon Laboratory, University of Oxford, Parks Road, Oxford, OX1 3PU, United Kingdom

Received 28 November 2000

Pump-probe time-resolved x-ray diffraction of allowed and nearly forbidden reflections in InSb is used to follow the propagation of a coherent acoustic pulse generated by ultrafast laser excitation. The surface and bulk components of the strain could be simultaneously measured due to the large x-ray penetration depth. Comparison of the experimental data with dynamical diffraction simulations suggests that the conventional model for impulsively generated strain underestimates the partitioning of energy into coherent modes.


©2001 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevLett.86.3072
DOI: 10.1103/PhysRevLett.86.3072
PACS: 63.20.-e, 61.10.-i, 78.47.+p

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