J. Phys. IV France
Volume 125, June 2005
Page(s) 335 - 337

J. Phys. IV France 125 (2005) 335-337

DOI: 10.1051/jp4:2005125079

Theory of in-plane motion induced by laser action on crystal surface

T. Pezeril, D. Mounier, V. Gusev, S. Gougeon, P. Ruello, N. Chigarev, P. Picart and J.-M. Breteau

Université du Maine, 72085 Le Mans, France

Interaction of ultrashort laser pulses with subsurface region of the material leads to the excitation of acoustic waves initially propagating both in the direction from the surface and in the direction to the surface. Even if the acoustic waves inially propagating in the direction from the surface do not return to the surface in form of an echo (because of their absorption) there is still an opportunity to get information on the optoacoustic transformation by detecting the motion of the crystal surface caused by the waves initially propagating towards the surface. This monitoring of the surface motion should be accomplished immediately following the laser action.

© EDP Sciences 2005