Wednesday, May 17, 2023
2:15 p.m.
KAUST, Auditorium BW Bldg. 4 & 5
Linear and non-linear core-level spectroscopies to investigate the structure and dynamics of matter
By Professor Majed Chergui, EPFL
Abstract
Core-level (absorption, emission, photoelectron) spectroscopies in the extreme-ultraviolet (EUV) to hard X-ray domains are element-selective tools that deliver information about the spin and electronic structure of a given atom and about the geometric structure around it. The development of ultrafast core-level spectroscopies has added the information about dynamical processes, which underlie how matter functions. The advent of X-ray free electron lasers has now enabled non-linear core-level spectroscopies, akin to the revolution brought about by the birth of the laser in the early 1960s. In this talk, I will dwell on examples of electronic and structural dynamics of chemical, biological systems and of materials unravelled by ultrafast X-ray spectroscopies. I will then discuss the nascent EUV/X-ray non-linear optical and spectroscopic techniques, which promise a new dimension in the way we interrogate matter properties.
