Special Seminar: Wolf Widdra - Institute of Physics, Martin-Luther-Universität Halle-Wittenberg: Laser-based double photoemission spectroscopy at surfaces

Abstract:
With the recent progress in high-order harmonic generation (HHG) using femtosecond lasers, laboratory photoelectron spectroscopy with an ultrafast, widely tunable vacuum-ultraviolet light source has become available. Whereas HHG-based photoemission experiments at kilohertz repetition rates have been severely limited by the space-charge effects in the past, the new development of compact HHG light sources with megahertz repetition rates allows for efficient photoemission and double photoemission experiments as is demonstrated here [1-7].