Regensburg 2010 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 5: Electron and spin dynamics I

O 5.3: Vortrag

Montag, 22. März 2010, 11:45–12:00, H34

Time and angle-resolved photoelectron spectroscopy of solids using femtosecond high-harmonic-generation pulses — •Timm Rohwer, Martin Wiesenmayer, Stefan Hellmann, Kai Rossnagel, Lutz Kipp, and Michael Bauer — Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel

Angle-resolved photoelectron spectroscopy (ARPES) has emerged as a leading technique in identifying static key properties of complex electron systems. In a pump-probe scheme using femtosecond XUV pulses this technique can be extended to monitor ultrafast changes in the electronic valence and core-level structure in response to an intense optical excitation. In this contribution we present first time-resolved ARPES data from Pt(111) recorded with a 3 kHz high-harmonic-generation source. A multilayer mirror monochromator guarantees a LAPE (laser-assisted photoemission) cross-correlation trace shorter than 35 fs, mainly governed by the width of the 800 nm excitation pulses. We furthermore proof the capability of this technique to monitor ultrafast band structure phenomena over the whole Brillouinzone.