Seminars Archive

Attosecond Time-resolved Photoelectron Spectroscopy

Abstract
Recently, the first demonstration of attosecond spectroscopy in condensed matter has been made. While these experiments provided insight into the fundamental process of photoemission itself, the methodology promises to allow for generalized study of electronic processes occuring in solids, surfaces and adsorbates. Such processes include charge transfer through interfaces, charge screening and the build-up of excited charge states, which can directly preceed structural dynamics that occur on a femtosecond timescale. Here, the principles of attosecond spectroscopy utilizing isolated attosecond XUV pulses will be described, followed by a report on the current state of the technology. Our latest results involving time-resolved photoemission from a xenon monolayer on a rhenium substrate will be presented. The goal of these efforts has been to determine the absolute time between the absorption of an XUV photon and the emergence of a photoelectron into the vacuum.