Dresden 2009 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 27: Poster Session I (Methods: Scanning probe techniques; Methods: Atomic and electronic structure; Methods: Molecular simulations and statistical mechanics; Oxides and Insulators: Clean surfaces; Oxides and Insulators: Adsorption; Oxides and Insulators: Epitaxy and growth; Semiconductor substrates: Clean surfaces; Semiconductor substrates: Epitaxy and growth; Semiconductor substrates: Adsorption; Nano- optics of metallic and semiconducting nanostructures; Electronic structure; Methods: Electronic structure theory; Methods: other (experimental); Methods: other (theory); Solutions on surfaces; Epitaxial Graphene; Surface oder interface magnetism; Phase transitions; Time-resolved spectroscopies)
O 27.113: Poster
Dienstag, 24. März 2009, 18:30–21:00, P2
Time-, energy- and angle-resolved photoelectron spectroscopy of surface dynamics using femtosecond XUV pulses — •Frederik Deicke1, Stefan Mathias1, Andreas Ruffing1, Luis Miaja-Avila2, Margaret Murnana2, Henry Kapteyn2, Michael Bauer3, and Martin Aeschlimann1 — 1Department of Physics and Research Center OPTIMAS, University of Kaiserslautern, D-67663 Kaiserslautern, Germany — 2JILA, University of Colorado, Colorado 80309-0440, USA — 3Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, D-24908 Kiel, Germany
The angle resolved photoelectron spectroscopy (ARPES) has emerged as a leading technique in identifying static key properties of complex systems such as the electronic band structure of adsorbed molecules, ultrathin quantum-well films or high temperature superconductors. We present an experimental setup combining the ARPES technique with a pump-probe scheme for time-resolved measurements using a 1 kHz femtosecond high-harmonic generation (HHG) XUV source [1]. The performance of the system with respect to time-, energy- and momentum-resolution will be discussed on the basis of ARPES spectra recorded with ultra short photon pulses of τ=7 fs and hν=42 eV [2]. Furthermore, the potential of time-resolved ARPES to study surface dynamics in future experiments, as e.g. photo-induced phase transitions, is considered.
[1] S. Mathias et al., Rev. Sci. Instrum. 78, 083105 (2007) [2] S. Mathias et al., Journ. of Phys. : conference proc., in print