Vitali Goussev
Universite du Maine, Le Mans, France
时间:2017-12-08 10:00
Knowledge of pressure-dependences of sound velocities and elastic moduli of liquids and solids and understanding of the material texturing, plastic deformation and convection with increasing pressure is of extreme importance for a few branches of natural sciences such as condensed matter physics, physics of the Earth, seismology and planetology, as well as for monitoring of earthquakes, tsunamis or nuclear weapons tests. Starting 2008 lasers have been increasingly applied for the generation and detection of the bulk acoustic waves in the materials subjected to high pressures in diamond anvil cells (DAC). Until now it was demonstrated that subnanosecond, femtosecond and picosecond laser pulses can be applied for the generation of compression/dilatation and shear bulk acoustic waves and bulk acoustic waves skimming along the interfaces between different materials confined in a DAC. Optical monitoring of the propagation of these waves provides information on the sound velocities and sound attenuation in materials under high pressures.
Dr. Vitali Goussev received the PhD degree in Physics and Mathematics from the Moscow State University of Russia in 1982. He is the professor of Universite du Maine, Le Mans, France since 1998. He is also the Associate professor of International Laser Centre of Moscow State University of Russia in 1990-1998. His most recent awards include 2016 Fellow of the American Physical Society for fundamental contibutions to the study of nonlinear acoustics of mesostructure media, and laser-induced ultrafast opto-acoustic phenomena in semiconductors and nanostructrued materials and 2013 Fellow of the Acoustical Society of America for contributions to nonlinear acoustics and laser-based ultrasonic pulse generation.