Strong-field ionization inducing multi-electron-hole coherence probed by attosecond pulses

TL;DR

This paper introduces a novel IR-pump-XUV-probe method to observe real-time multi-electron-hole coherence during strong-field ionization, revealing how electron dynamics influence XUV absorption and emission.

Contribution

It develops an analytical model incorporating multielectron configurations to study electron-hole coherence driven by combined IR and attosecond pulses.

Findings

Emission spectra modulate with pulse delay, revealing electron-hole dynamics.

Core-valence transition signals provide real-time insight into ionization.

Multi-electron coherence affects forbidden XUV processes.

Abstract

We propose a new scenario to apply IR-pump-XUV-probe schemes to resolving strong field ionization induced and attosecond pulse driven electron-hole dynamics and coherence in real time. The coherent driving of both the infrared laser and the attoscond pulse correlates the dynamics of the core-hole and the valence-hole which leads to the otherwise forbidden absorption and emission of XUV photon. An analytical model is developed based on the strong-field approximation by taking into account of the essential multielectron configurations. The emission spectra from the core-valence transition and the core-hole recombination are found modulating strongly as functions of the time delay between the two pulses, which provides a unique insight into the instantaneous ionization and the interplay of the multi-electron-hole coherence.