Bonn 2025 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 22: Poster – Attosecond Physics

A 22.6: Poster

Mittwoch, 12. März 2025, 17:00–19:00, Tent

Noise Parametrization and Simulation for Attosecond Streaking — •Luc-Fabrice Tremel, Sven-Joachim Paul, Maximilian Forster, and Reinhard Kienberger — Chair for laser and x-ray physics E11, Technische Universität München, Germany

We address the extraction of noise parameters from attosecond streaking measurements and their influence on the performance of the restricted time-dependent Schrödinger equation (rTDSE) algorithm for photoemission time delay retrieval. The development and application of noise parameter extraction techniques reveal an energy and target-specific behavior of multiplicative noise not accounted for in previous works. This insight and the retrieved parameters from real attosecond streaking measurements allow a refinement of streaking simulation methods. Using these simulations to study the influence of noise on the rTDSE method confirm that an increase in noise results in a broader spread of retrieved delays but no directional shift, affirming the application of the rTDSE retrieval method for the analysis of attosecond streaking measurements. The developed tools allow future projects to be based on spectrograms more closely resembling those observed in the experiment.

Keywords: Photoemission Timing; Attosecond Streaking; Noise Parametrization; Noise Simulation; rTDSE