Reis D A, DeCamp M F, Bucksbaum P H, Clarke R, Dufresne E, Hertlein M, Merlin R, Falcone R, Kapteyn H, Murnane M M, Larsson J, Missalla T, Wark J S
Departement of Physics, University of Michigan, Ann Arbor 48109-1120, USA.
Phys Rev Lett. 2001 Apr 2;86(14):3072-5. doi: 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.
