The understanding and manipulation of charge and heat transport has a crucial importance for technological applications, impacting e.g. thermal management applications down to the nanoscale. Recently, hydrodynamic transport has stirred excitement in the scientific community.  The potential of the field extends from finding new fundamental physics to some truly novel applications. 

The goal of this project is to achieve control over heat and charge transport in the hydrodynamic regime. To tame the elusive character of hydrodynamic transport, a deep understanding of materials science and device engineering are needed just as well as novel computational transport models and experimental protocols.

In the frame of this project, we will perform pump-probe inelastic light scattering experiments, which gives important information on the time scale of phonon dynamics. It allows a direct determination of the absolute phonon mode population and of its temporal evolution. We will also perform pump-probe experiments in a spatially resolved manner in order to measure the phonon mean free path and coherence length of (selectively) excited phonon modes. Pump-probe experiments will also be conducted on 2D layers integrated in devices consisting of suspended SiNx membranes with implemented metallic coils, which can be used both as heaters and thermometers. In this way, we will be able to probe the time evolution of coherent excitations.