AUTHOREA
Log in
Sign Up
Browse Preprints
LOG IN
SIGN UP
Essential Maintenance
: All Authorea-powered sites will be offline 4pm-6pm EDT Tuesday 28 May for essential maintenance.
We apologise for any inconvenience.
Pol Grasland-Mongrain
Postdoctoral fellow
University of Montreal
Public Documents
1
Generation of Shear Waves by Laser in Soft Media in the Ablative and Thermoelastic Re...
Pol Grasland-Mongrain
and 1 more
January 07, 2016
This article describes the generation of elastic shear waves in a soft medium using a laser beam. Our experiments show two different regimes depending on laser energy. Physical modeling of the underlying phenomena reveals a thermoelastic regime caused by a local dilatation resulting from temperature increase, and an ablative regime caused by a partial vaporization of the medium by the laser. Computed theoretical displacements are close to experimental measurements. A numerical study based on the physical modeling gives propagation patterns comparable to those generated experimentally. These results provide a physical basis for the feasibility of a shear wave elastography technique (a technique which measures a soft solid stiffness from shear wave propagation) by using a laser beam.