Séminaire – Simone FINIZIO

Jeudi 12 février à 15h (auditorium TRT), nous aurons le plaisir d’ouvrir la série des séminaires du laboratoire 2026 avec une présentation de Dr. Simone FINIZIO (Paul Scherrer Institut, Suisse).

Title
“Bright days ahead – Soft X-ray scanning microscopy at 4th generation light sources”.

Abstract :

Diffraction limited synchrotron (DLSR), or 4th generation, light sources are a novel design promising an increase in the coherent photon flux of several orders of magnitude compared to the current 3rd generation storage ring design. These improvements are revolutionizing synchtrotron-based experiments, and several light sources around the world are currently undergoing, or planning an upgrade to a DLSR.

For scanning transmission X-ray microscopy (STXM), the increase in coherent photon flux will allow us to routinely perform high-resolution imaging, as it will tackle all the issues occurring for high-resolution X-ray optics. In addition, the combined increase in coherent photon flux, in the available (GPU) computational power, and in the performances of 2D soft X-ray detectors will also enable for the routine performing of high-resolution soft X-ray ptychographic imaging.

In this presentation, I will show the current status of the commissioning of a new combined STXM and soft X-ray ptychography endstation, performed at the SoftiMAX beamline of the MaxIV DLSR, and the first results in the ptychographic imaging of the magneto-electric coupling between ferroelectric domains and spin cycloid in freestanding BiFeO3 thin films, which fully exploit the sub-5nm spatial resolutions achievable with the technique.