Probing impulsive strain propagation with x-ray pulses
Publikation/Tidskrift/Serie: Physical Review Letters - Moving Physics Forward
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.
- Physics and Astronomy
- ISSN: 0031-9007