Freiburg 2024 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 2: Attosecond Physics I (joint session A/MO)

A 2.2: Vortrag

Montag, 11. März 2024, 11:15–11:30, HS 1098

Extreme ultraviolet wave packet interferometry using table-top high harmonic generation — •Sarang Dev Ganeshamandiram, Fabian Richter, Ianina Kosse, Ronak Shah, Mario Niebuhr, Giuseppe Sansone, Frank Stienkemeier, and Lukas Bruder — 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) domain set the basis for establishing advanced nonlinear spectroscopy methods in this wavelength regime [1]. These methods are however very difficult to implement at short wavelengths due to the required high phase stability and sensitivity. We are exploring methods based on acousto-optical phase modulation (PM) to solve these problems. First results from applications in seeded FELs and table-top high-harmonic generation (HHG) are promising [2,3]. Here, we will present an interferometer setup specifically designed for application with table-top HHG and discuss current challenges.

[1] S. Mukamel, et al., Multidimensional Attosecond Resonant X-Ray Spectroscopy of Molecules: Lessons from the Optical Regime, Annu. Rev. Phys. Chem. 64, 101 (2013).

[2] A. Wituschek, et al., Tracking attosecond electronic coherences using phase-manipulated extreme ultraviolet pulses, Nat Commun 11, 883 (2020).

[3] A. Wituschek et al., Phase cycling of extreme ultraviolet pulse sequences generated in rare gases, New J. Phys. 22, 092001 (2020).

Keywords: XUV; Wavepacket interferometry; HHG; Phase modulation; Autocorrelation