Alex Fontana de l'Institut Neel (Grenoble) donnera un séminaire intitulé "Study of thermal properties of micro- and nano-resonators through heating"le Vendredi 25 Novembre à 11h dans l'amphi V de Centrale-Supelec
Abstract:
The interaction between light and micro- and nano-mechanical systems has a wide variety of applications, spanning from reading mechanical vibrations, cooling and heating mechanical modes and extracting information about the resonator itself.
During this presentation, I will show some examples of how light, in particular through heating, allows us to retrieve important properties of the physical system involved.
First I will show how, when a laser beam non-uniformly heats a silicon micro-cantilever, the behavior of the system’s thermal noise characterizes the local energy dissipation.
Next, I will present various experiments involving silicon carbide nanowires, where we extract information about thermal properties of our samples using a pump-probe setup. This study becomes particularly interesting when bulk thermal properties and linear temperature profiles cannot be expected, for example when the system is placed at low temperature.
