Ultrafast photo-induced dynamics of thin films under hydrostatic pressure
Univ Rennes, CNRS, IPR (Institut de Physique de Rennes), UMR 6251, 35000, Rennes, France
2 DYNACOM IRL 2015, University of Tokyo-CNRS-UR1, Departement of Chemistry, 7-3-1 Hongo, 113-0033, Tokyo, Japan
3 Nantes Université, CNRS, Institut des Matériaux de Nantes Jean Rouxel, IMN, 44000, Nantes, France
Accepted: 20 September 2022
Published online: 11 October 2022
Controlling material properties with light pulses represents one of the next great challenge in material science. To achieve this goal, one needs to impact the material on the relevant time scale for controlling electronic and phononic properties. Targeting this challenge becomes possible thanks to the emerging field of photo-induced phase transition when a femtosecond light pulse interacts with the system. Along this line, we demonstrate the possibility to perform femtosecond optical spectroscopy under control thermodynamical environment. This new experimental setup includes a very precise pressure control between 1 and 6 kbar. These experimental results clearly demonstrate an effect of hydrostatic pressure onto the out-of-equilibrium photo-response of . The main feature is a blue shift of the Brillouin frequency that correlates with an increasing speed of sound.
© The Author(s), under exclusive licence to EDP Sciences, Springer-Verlag GmbH Germany, part of Springer Nature 2022. Springer Nature or its licensor holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.