Phase retrieval from angular streaking of XUV atomic ionization

TL;DR

This paper presents a numerical method for accurately retrieving phase information from XUV atomic ionization by analyzing the streaking of photoelectrons in a circularly polarized IR field, validated against RABBITT simulations.

Contribution

It introduces a new technique for phase retrieval in XUV ionization using streaking in a circularly polarized field, validated through numerical simulations and comparison with RABBITT.

Findings

The streaking phase can be converted to atomic time delay including Wigner and continuum-continuum components.

The technique is validated against RABBITT simulations showing equivalent phase and timing information.

The method is applicable to a broad range of atomic and molecular targets with XUV radiation.

Abstract

We demonstrate an accurate phase retrieval of XUV atomic ionization by streaking the photoelectron in a circularly polarized IR laser field. The streaking phase can then be converted to the atomic time delay containing the Wigner and continuum-continuum components. Our demonstration is based on a numerical solution of the time-dependent Schr\"odinger equation. We test this technique using the hydrogen atom ionized by an isolated attosecond XUV pulse across a wide range of photon energies. In parallel, we run a series of RABBITT simulations and demonstrate equivalence of the phase and timing information provided by the two methods. This validates the proposed technique and makes it a useful tool that can be applied to a broad range of atomic and molecular targets exposed to XUV radiation from novel free-electron laser sources.