Speaker
Description
The properties and functionalities of solids, molecules and hybrid compounds used in modern technology is dictated by the interplay between the electronic, lattice and spin degrees of freedoms. Pump-probe techniques are ideal to selectively investigate their time evolution and disentangle complex processes. Their extension to the Extreme Ultraviolet and X-ray regime allows element specificity and the possibility to access meso- and nanoscopic length scales.
In this talk I will introduce two spectroscopy techniques aiming at accessing the mesoscopic range, inaccessible with common optical laser spectroscopies or X-ray and neutron scattering experiments. I’ll start by showing how Extreme Ultraviolet (EUV) Transient Grating spectroscopy, pioneered at the FERMI free electron laser, accesses thermo- and magnetoelastic properties of matter. Then, I’ll discuss its complementarity with the recently demonstrated extension to the hard X-ray. Finally, I will present EUV diffuse scattering as a complementary technique and address how it could potentially be performed at synchrotrons with ps time resolution.
