Theoretical analysis of time delays and streaking effects in XUV photoionization

TL;DR

This paper presents a theoretical and numerical study of time delays in XUV photoionization, comparing different methods and analyzing streaking effects, to deepen understanding of electron dynamics in short- and long-range potentials.

Contribution

It introduces a new numerical approach for calculating time delays in XUV photoionization and compares it with established methods, including effects of streaking fields.

Findings

Numerical simulations align with Wigner-Smith time delay results.

Streaking fields influence the measured time delays.

The method applies to both short- and long-range potentials.

Abstract

We apply a recently proposed theoretical concept and numerical approach to obtain time delays in extreme ultraviolet (XUV) photoionization of an electron in a short- or long-range potential. The results of our numerical simulations on a space-time grid are compared to those for the well-known Wigner-Smith time delay and different methods to obtain the latter time delay are reviewed. We further use our numerical method to analyze the effect of a near-infrared streaking field on the time delay obtained in the numerical simulations.