Bonn 2025 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

K: Fachverband Kurzzeit- und angewandte Laserphysik

K 3: Light and Radiation Sources I

K 3.2: Talk

Monday, March 10, 2025, 17:30–17:45, HS XI ITW

Investigating Photoionization Delays with an Attosecond Source Synchronized with an Infrared OPA — •Muhammad Jahanzeb¹, Marvin Schmoll¹, Narendra Shah Ronak¹, Cristian Manzoni², and Giuseppe Sansone¹ — ¹Institute of Physics, University of Freiburg, Freiburg, Germany — ²Institute for Photonics and Nanotechnology - CNR Piazza Leonardo da Vinci 32, 20133 Milano, Italy

The precise measurement of photoionization delays on attosecond timescales is critical to understanding ultrafast electron dynamics in atoms and molecules. The Reconstruction of Attosecond Beating by Interference of Two-Photon Transitions (RABBIT) technique provides a powerful tool to probe these delays [1-2].

We present an experimental setup in development design to investigate continuum-continuum delays in photoionization using synchronized attosecond extreme ultraviolet (XUV) and infrared (IR) pulses. High-order harmonics are generated by an 800 nm driving laser to produce attosecond XUV pulses, which are then combined with a precisely synchronized 1200 nm pulse from a non-collinear optical parametric amplifier (OPA). This setup enables the generation of two sidebands between photoelectron peaks caused by the absorption of single XUV photons. By analyzing the phase oscillations of adjacent sidebands, we aim to disentangle the contribution of continuum-continuum phases in the photoionization process. [1] Paul et al, Science, 292 (2001) [2] Dahlström et al, Journal of Physics, 45 (2012)

Keywords: High Harmonic generation (HHG); Optical parametric amplification (OPA); XUV-Interferometer; Photoionization Delays; RABBIT