Date: May 08, 2008
Time: 3:30 pm - 4:00 pm

Luis Miaja-Avila of the University of Colorado/JILA
Orange Room

abstract:
The recent progress in the creation of femtosecond and attosecond EUV pulses by means of high-order harmonic generation (HHG) opens the potential to operate ultraviolet photoelectron spectroscopy (UPS) in a time-resolved mode. The ultrashort pulse duration of these EUV pulses can be used as a probe of molecular and electron dynamics on surfaces. In particular, the observation of laser-assisted photoemission on surfaces has allowed the study of underlying electron dynamics in solid and surface-adsorbate systems. Recently, by means of laser-assisted photoemission and laser-assisted Auger decay, we were able to measure the core hole lifetime of Xe atoms physisorbed on a Pt(111) surface. This effect promises to be useful in the study of charge transfer in complex substrate-adsorbate systems.