SAMOP 2021 – scientific programme

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MO: Fachverband Molekülphysik

MO 7: Poster 1

MO 7.14: Poster

Thursday, September 23, 2021, 17:30–19:30, P

Low dispersive phase modulation scheme for interferometric XUV experiments — •Fabian Richter, Sarang D. Ganeshamandiram, Ianina Kosse, Ronak Shah, Giuseppe Sansone, Frank Stienkemeier, and Lukas Bruder — Institute of Physics, University of Freiburg, Hermann-Herder-Str. 3, 79104 Freiburg, Germany

Quantum interference spectroscopy schemes are well established in the visible range to control and resolve the static properties and dynamics of quantum systems. Recently these principles got extended into the XUV regime [1,2]. Here acousto-optical modulators are used to achieve interferometric measurements supported by a phase cycling scheme. However, in this scheme a significant amount of material is introduced in the optical beam path at the fundamental frequency which prohibits using ultrashort pulses and high laser intensities. We present a new approach to achieve phase cycling while minimizing the amount of material dispersion by an order of magnitude. We will present the basic concept of this approach. The setup is commissioned and will be combined with a tabletop HHG source to conduct studies in the XUV regime.

[1] Wituschek, A., Bruder, L., Allaria, E. et al. Tracking attosecond electronic coherences using phase-manipulated extreme ultraviolet pulses. Nature Communications 11, 883 (2020).

[2] Wituschek, A., Kornilov, O., Witting, T., et al. Phase Cycling of Extreme Ultraviolet Pulse Sequences Generated in Rare Gases. New Journal of Physics 22, Nr. 9 (September 2020): 092001.