Angular anisotropy of time delay in XUV/IR photoionization of H$_2^+$

TL;DR

This paper introduces a new computational method for modeling atomic and molecular ionization under combined XUV and IR fields, enabling detailed analysis of photoemission time delays in experiments like RABBITT.

Contribution

The authors develop a novel time-dependent Schrödinger equation approach that expands with the wave packet, improving efficiency for simulating ionization in complex field configurations.

Findings

Successfully modeled angular anisotropy of photoemission delay in H₂⁺

Demonstrated method's effectiveness with RABBITT experiment parameters

Provides detailed insights into time delay phenomena in molecular ionization

Abstract

We develop a novel technique for modeling of atomic and molecular ionization in superposition of XUV and IR fields with characteristics typical for attosecond streaking and RABBITT experiments. The method is based on solving the time-dependent Schr\"odinger equation in the coordinate frame expanding along with the photoelectron wave packet. The efficiency of the method is demonstrated by calculating angular anisotropy of photoemission time delay of the H$_2^+$ ion in a field configuration of recent RABBITT experiments.