Freiburg 2024 – scientific programme

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A: Fachverband Atomphysik

A 33: Poster VI

A 33.6: Poster

Thursday, March 14, 2024, 17:00–19:00, Tent A

Acquisition and analysis of RABBIT measurements — •Muhammad Jahanzeb, Narendra Shah Ronak, Cristian Manzoni, Devkota Diwaka, and Giuseppe Sansone — Institute of Physics, University of Freiburg, Freiburg, Germany

The Reconstruction of Attosecond Beating by Interference of Two-Photon Transitions (RABBIT), is a technique used to measure time delays in photoionization on an attosecond scale [1-2]. In the RABBIT technique, the photoionization delays measured in atoms can be decomposed in a Wigner delay, related to the photoionization process induced by the absorption of a single extreme ultraviolet photon, and a continuum-continuum delay, due to the absorption of additional infrared photons by the freed photoelectron [2].

I will report on the development of an experimental setup aiming at the investigation of the continuum-continuum delay in photoionization. In the experimental setup, high-order harmonics will be generated using a 800 nm driving laser that will be then recombined with a synchronized 1200 nm pulse obtained using a non-collinear optical parametric amplifier [3]. Using this combination of parameters, two sidebands are expected between the each pair of photoelectron peaks associated to the absorption of a single XUV photon. By comparing the oscillations of adjacent sidebands, we are aiming to investigate the contribution of the continuum-continuum phase in the photoionization process. [1] Paul et al, Science, 292 (2001) [2] Dahlström et al, Journal of Physics, 45 (2012) [3] Manzoni et al, Journal of Optics, 18 (2016)

Keywords: OPA; RABBIT; non-colinear