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Regensburg 2019 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 45: Poster Tuesday: Ultrafast Processes

O 45.1: Poster

Dienstag, 2. April 2019, 18:00–20:00, Poster D

Four-dimensional XUV time- and angle-resolved photoemission spectroscopy of solids at 500 kHzMichele Puppin1,2, Christopher W. Nicholson1,3, •Samuel Beaulieu1, Shuo Dong1, Tommaso Pincelli1, Patrick Xian1, Maciej Dendzik1, Yoav W. Windsor1, Yunpei Deng1,4, Claude Monney1,3, Martin Wolf1, Laurenz Rettig1, and Ralph Ernstorfer111Department of Physical Chemistry, Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195 Berlin — 22Laboratory of Ultrafast Spectroscopy, ISIC, and Lausanne Centre for Ultrafast Science (LACUS), Ecole Polytechnique Federale de Lausanne, CH-1015 Lausanne, Switzerland — 34Department of Physics, University of Fribourg, Chemin du Musee 3, 1700 Fribourg, Switzerland — 43Paul Scherrer Institute, Swiss FEL, 5232 Villigen PSI, Switzerland

We report on four-dimensional time- and angle-resolved photoelectron spectroscopy (trARPES) employing a 500 kHz extreme-ultraviolet (XUV) light source operating at 21.7 eV probe photon energy [1]. This beamline is coupled to a state-of-the-art time-of-flight momentum microscope (METIS 1000, SPECS GmbH) that allows us to measure the out-of-equilibrium multidimensional electronic band structure of solids (including excited states) in the entire Brillouin zone and with a temporal system response function below 40 fs. Exemplary data on inorganic and organic semiconductors will be presented. [1] Puppin et al., arXiv:1811.06939v1 [physics.ins-det] (2018).

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