Regensburg 2019 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 63: Poster Wednesday: Ultrafast Processes

O 63.5: Poster

Mittwoch, 3. April 2019, 17:45–20:00, Poster B1

Towards time resolved photoemission spectroscopy using a circularly polarized fs-XUV light source — •Pascale Klaeger1, Sebastian Emmerich1, Jonas Hoefer1, Sebastian Hedwig1, Johannes Stöckl1, Benito Arnoldi1, Ofer Kfir2, Claus Ropers2, Benjamin Stadtmüller1, and Martin Aeschlimann11University of Kaiserslautern and research center OPTIMAS, Erwin-Schrödinger-Str. 46, 67663 Kaiserslautern, Germany — 2Georg-August-Universität Göttingen, IV. Physikalisches Institut, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany

The combination of photoelectron spectroscopy with XUV- or soft x-ray radiation with circular polarization offers the intriguing opportunity to determine not only the band structure of solids but also to gain insight into the orbital character and the symmetry of the electronic states in these systems. Such radiation was so far mainly available at large scale facilities such as synchrotron light sources. Recent progress in high harmonic generation has demonstrated a novel way to create circularly polarized fs-XUV light on a laboratory scale1,2. Here, we show the implementation of the so called MAZEL-TOV device2 into our HHG beamline and discuss our first ARPES data results obtained with circularly polarized fs-XUV radiation for ferromagnetic surfaces.

1O. Kfir et al., Nat. Phot. 9, 99 (2015) 2O. Kfir et al., Appl. Phys. Lett. 108, 211106 (2016)

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