Regensburg 2019 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
O: Fachverband Oberflächenphysik
O 85: Ultrafast Electron Dynamics at Surfaces and Interfaces II: New Methods and Developments
O 85.5: Talk
Thursday, April 4, 2019, 16:00–16:15, H16
Experimental setup for time-resolved momentum microscopy — •Jasmin Fehl1, Katerina Medjanik2, David Janas1, Felix Paßlack1, Stefano Ponzoni1, Mahdi Hajlaoui1, Giovanni Zamborlini1, Gerd Schönhense2, and Mirko Cinchetti1 — 1Experimentelle Physik VI, TU Dortmund, Otto-Hahn-Straße 4, 44227 Dortmund, Germany — 2Institut für Physik, Johannes Gutenberg-Universität, Staudinger Weg 7, 55128 Mainz, Germany
ARPES is the most common method to map electronic bands. Recently, momentum microscopy (MM), has been introduced as a novel highly efficient way to perform ARPES in large momentum space regions [1]. In this talk, we will discuss the realization and characterization of an experimental apparatus for laser-assisted MM. The setup is based on a sub-100 fs laser system for pump-probe experiments with pump and probe beams tunable in the whole visible spectrum (photon energy range: 1.0 eV - 6.0 eV) and repetition rate tunable from single shot up to 1 MHz. The laser is coupled to a momentum microscope equipped with a time of flight analyser. This system will allow us to probe the ultrafast dynamics in low-dimensional electron systems, with particular emphasis on hybrid interfaces - so called molecular spinterfaces [2] - and on materials with non-trivial spin-texture, such as topological insulators.
[1] Medjanik, K. et al. Nature Materials 16, 61 (2017)
[2] M. Cinchetti, V. A. Dediu, and L.E. Hueso, Nature Materials 16, 507 (2017).