Marvin Reuner, Universität Hamburg

Abstract:

We theoretically describe time-resolved momentum microscopy of excited-state dynamics in molecules. In particular, we consider time- and angle-resolved photoelectron spectra obtained by means of ultrashort photoionizing extreme ultraviolet (XUV) probe pulses. In the first part of the presentation, we calculate photoelectron momentum maps (PMMs) probing excited-state dynamics on an atomic scale in a pentacene bilayer adsorbed on a silver substrate [1] and Copper phthalocyanine (CuPc) adsorbed on Titanium Diselenide (TiSe2) [2] and compare them to experimental data obtained at the Free-Electron Laser FLASH in Hamburg.
In the second part of the presentation, we theoretically describe how time-resolved momentum microscopy can be applied to probe excited state dynamics in molecules on attosecond time scales. We study properties of coupled electron-hole dynamics on
an atomic scale, which can be revealed by attosecond to few-femtosecond momentum microscopy.

References
[1] Baumgärtner, K., Reuner, M., Metzger, C. et al. Ultrafast orbital tomography of a pentacene film using time-resolved momentum microscopy at a FEL. Nat Commun 13, 2741 (2022). https://doi.org/10.1038/s41467-022-30404-6
[2] K. Baumgärtner, M. Nozaki, M. Reuner, N. Wind, C. Metzger, M. Haniuda, M. Heber, D. Kutnyakhov, F. Pressacco, L. Wenthaus, C.-H. Min, F. Reinert, F. Roth, S. Mahatha, A. Madsen, T. Wehling, K. Niki, D. Popova-Gorelova, K. Rossnagel, M. Scholz, The complete interface molecular movie: One-stop imaging of electronic and structural dynamics (submitted 2022)

Poster Session Link: https://gather.town/invite?token=0pEoq7VP

If you have any questions for the presenter, please contact them via email: marvin.reuner@uni-hamburg.de