Probing impulsive strain propagation with X-ray pulses.
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.
Reis
D A
DA
Departement of Physics, University of Michigan, Ann Arbor 48109-1120, USA.
DeCamp
M F
MF
Bucksbaum
P H
PH
Clarke
R
R
Dufresne
E
E
Hertlein
M
M
Merlin
R
R
Falcone
R
R
Kapteyn
H
H
Murnane
M M
MM
Larsson
J
J
Missalla
T
T
Wark
J S
JS