Probing impulsive strain propagation with x-ray pulses

Details Probing impulsive strain propagation with x-ray pulses Probing impulsive strain propagation with x-ray pulses

2001-02-09

arxiv.org/abs/cond-mat/0102179v1

Physics

Condensed Matter

4 pages, 2 figures, LaTeX, eps. Accepted for publication in Phys. Rev. Lett. http://prl.aps.org

Scientific paper

10.1103/PhysRevLett.86.3072

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.

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