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MO: Fachverband Molekülphysik

MO 15: Poster 2

MO 15.11: Poster

Mittwoch, 16. März 2022, 16:30–18:30, P

A setup for extreme ultraviolet wave packet interferometry using tabletop high harmonic generation — •Sarang Dev Ganeshamandiram, Fabian Richter, Ianina Kosse, Ronak Shah, Lukas Bruder, Giuseppe Sansone, and Frank Stienkemeier — Institute of Physics, University of Freiburg, Hermann-Herder-Str. 3, 79104 Freiburg, Germany

Quantum interference techniques such as wave packet interferometry (WPI) in the extreme ultraviolet (XUV) regime set the basis for advanced nonlinear spectroscopy methods, such as multidimensional spectroscopy. These methods are however very difficult to implement at short wavelengths due to the required high phase stability and sensitivity. Recently, we have overcome these difficulties and have introduced a concept to implement such experiments with XUV free-electron lasers [1]. We are now developing a new setup optimized for seeding tabletop high-harmonic generation sources which is based on acousto-optic modulation of intense near infrared pulses. In the initial experiments, photons around 30 eV (19th harmonic) are generated and the effect of temporal and spatial dispersion were studied. Here, we will present the concept of the setup along with first characterization results. 1. A. Wituschek et al., Tracking attosecond electronic coherences using phase-manipulated extreme ultraviolet pulses, Nature Communications, 11:883 (2020).