Phase evolution of strong-field ionization
Abstract
We investigate the time-dependent evolution of the dipole phase shift induced by strong-field ionization (SFI) using attosecond transient absorption spectroscopy (ATAS) for time-delays where the pump-probe pulses overlap. We study measured and calculated time-dependent ATA spectra of the ionic 4d-5p transition in xenon, and present the time-dependent line shape parameters in the complex plane. We attribute the complex, attosecond-scale dynamics to the contribution of three distinct processes: accumulation of ionization, transient population, and reversible population of excited states arising from polarization of the ground state.
Keywords
Cite
@article{arxiv.2502.19010,
title = {Phase evolution of strong-field ionization},
author = {Lynda R Hutcheson and Maximilian Hartmann and Gergana D Borisova and Paul Birk and Shuyuan Hu and Christian Ott and Thomas Pfeifer and Hugo W van der Hart and Andrew C Brown},
journal= {arXiv preprint arXiv:2502.19010},
year = {2025}
}
Comments
6 pages, 6 figures. All data in the manuscript and the minimal model can be found in the GitHub repository, see https://github.com/lhutcheson/dipole_response.git