Dresden 2020 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 52: Poster Session - New Methods: Experiments

O 52.8: Poster

Dienstag, 17. März 2020, 18:15–20:00, P2/1OG

New 100-kHz User Beamline Based on High-Harmonic Generation for Time-Resolved Photoemission — •Charlotte E. Sanders, Yu Zhang, Adam S. Wyatt, Gabriel Karras, Richard T. Chapman, Gregory M. Greetham, Michael Towrie, and Emma Springate — Central Laser Facility, STFC Rutherford Appleton Laboratory, Harwell OX11 0QX, UK

The UK’s Central Laser Facility (CLF) Artemis Laboratory offers open access to pump-probe angle-resolved photoemission spectroscopy (ARPES), whereby ultrafast dynamics in solid-state systems can be probed using high-harmonic generation. Our beamline supports the study of dynamics ranging from the femtosecond to the picosecond regimes, with tuneable polarization in both the pump and probe. We have recently upgraded our capabilities to include a 100-kHz laser system. In our first user call, in 2020, we plan to offer temporal and spectral resolution of around 50 fs and 100 meV, respectively, and probe photon energies of 25–40 eV, combined with pump photon energies of 0.48 or 0.73 eV (1.7 or 2.6 µm). In the future, with further development, we will offer additional options such as tuneable pump energy and probe energies up to 100 eV. The high repetition rate will permit favourable statistics and space charge conditions relative to lower-repetition rate systems.