Berlin 2012 – scientific programme
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O: Fachverband Oberflächenphysik
O 35: Poster Session II (Polymeric biomolecular films; Nanostructures; Electronic structure; Spin-orbit interaction; Phase transitions; Surface chemical reactions; Heterogeneous catalysis; Particles and clusters; Surface magnetism; Electron and spin dynamics; Surface dynamics; Methods; Electronic structure theory; Functional molecules)
O 35.72: Poster
Tuesday, March 27, 2012, 18:15–21:45, Poster B
Time-resolved ARPES studies with high-oder harmonic radiation — •Björn Frietsch1,2, Robert Carley1,2, Martin Teichmann1,2, Kristian Döbrich1, Cornelius Gahl2, and Martin Weinelt2 — 1Max-Born-Institut, Max-Born-Straße 2A, 12489 Berlin, Germany — 2Freie Universität Berlin, Fachbereich Physik, Arnimallee 14,14195 Berlin, Germany
We present results from a high-order harmonics XUV source and beamline. The setup produces XUV photons between 20-65 eV, at an energy resolution of 150 meV and a pulse duration of 100 fs for time-resolved photoelectron spectroscopic studies of laser-driven dynamics in correlated systems. To create harmonics, 40-fs pulses from a commercial amplified Ti:Sapphire laser system running at 10 kHz repetition rate are focused into an argon-filled gas cell. The XUV wavelength and energy resolution are selected using a toroidal grating monochromator. We have used the instrument to study ultrafast magnetization of the lanthanide metals Gadolinium and Terbium, and to perform preliminary experiments on laser-driven phase transitions in VO2.