Atomic phase delays in w-2w above-threshold ionization

LÓPEZ, S. D.; BURGDÖRFER, JOACHIM; ARBÓ, D. G.

St. Sauveur,

Simposio; 7th International Symposium on Intense Field, Short Wavelength Atomic and Molecular Processes ISWAMP; 2023

We theoretically explore the extraction of information on the ionization phases in a w – 2w setting. We find a very good agreement between our ab initio results of the time dependent Schrödinger equation and measured phase delays for Ar atoms [L. J. Zipp, A. Natan, and P. H. Bucksbaum 2014, Optica 1, 361] but significant differences with the strong field approximation even at energies well above the ionization threshold.