The Advantages of Polarization Control in RABBITT

TL;DR

This paper investigates how polarization control in RABBITT setups affects photoelectron angular distributions and temporal responses, using numerical simulations for neon ionization with various polarization configurations.

Contribution

It provides a comprehensive theoretical analysis of polarization effects in RABBITT, including new insights into geometrical and spectroscopic influences on photoelectron distributions.

Findings

Polarization configurations significantly influence photoelectron angular distributions.

Numerical simulations reveal distinct responses for different polarization setups.

Analysis distinguishes geometrical effects from spectroscopic features in ionization.

Abstract

The RABBITT setup is theoretically studied for various combinations of XUV and IR field components polarization: 'linear+linear', `linear+circular' with crossed propagation directions, and `circular+circular' with parallel propagation directions. The general properties of photoelectron angular distributions and their responses to the variation of the IR pulse delay are studied. Numerical simulations are performed for the neon valence shell ionization into the region of structureless continuum using two approaches based on time dependent perturbation theory and solution of rate equations. To distinguish between "geometrical" governed by fields' polarization and spectroscopic features, additional analysis for the case of $s$-shell ionization is presented.