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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 kHz — Michele Puppin^1,2, Christopher W. Nicholson^1,3, •Samuel Beaulieu¹, Shuo Dong¹, Tommaso Pincelli¹, Patrick Xian¹, Maciej Dendzik¹, Yoav W. Windsor¹, Yunpei Deng^1,4, Claude Monney^1,3, Martin Wolf¹, Laurenz Rettig¹, and Ralph Ernstorfer¹ — ¹1Department 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).