SAMOP 2021 – scientific programme

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MO: Fachverband Molekülphysik

MO 9: Poster 2

MO 9.15: Poster

Friday, September 24, 2021, 17:30–19:30, P

Coherent two-dimensional photoelectron spectroscopy — •Daniel Uhl, Ulrich Bangert, Lukas Bruder, and Frank Stienkemeier — Institute of Physics, University of Freiburg, Hermann-Herder-Str. 3, 79104 Freiburg, Germany.

Coherent multidimensional spectroscopy (CMDS) is probably the most complete spectroscopic technique to study couplings, coherence properties and real-time dynamics of a quantum system [1,2,3]. Another spectroscopic method is photoelectron spectroscopy which provides detailed information about the chemical composition and electronic states of the sample [4].

In our work we present a combination of both methods in a single experiment. This becomes feasible with the implementation of efficient single-counting detection and multichannel software-based lock-in amplification [5]. The approach offers high temporal, spectral and kinetic energy resolution. It enables differential CMDS experiments with unprecedented selectivity and enhances the dynamic range of CMDS by up to two orders of magnitude.

[1] D.M. Jonas, Annu. Rev. Chem. Phys. 54, 425-463 (2003).

[2] R.M. Hochstrasser, PNAS 104, 14190-14196 (2007).

[3] L. Bruder et al., Nat Commun 9, 4823 (2018).

[4] S. Hüfner, Photoelectron Spectroscopy: Principles and Applications (Springer Science & Business Media, 2013).

[5] D. Uhl, L. Bruder, and F. Stienkemeier, ArXiv, 2105.12124 (2021).