Spiral-like Holographic Structures: Unwinding Interference Carpets of Coulomb-Distorted Orbits in Strong-Field Ionization

Abstract

We unambiguously identify, in experiment and theory, a previously overlooked holographic interference pattern in strong-field ionization, dubbed "the spiral", stemming from two trajectories for which the binding potential and the laser field are equally critical. We show that, due to strong interaction with the core, these trajectories are optimal tools for probing the target \textbf{after} ionization and for revealing obfuscated phases in the initial bound states. The spiral is shown to be responsible for interference carpets, formerly attributed to direct above-threshold ionization trajectories, and we show the carpet-interference condition is a general property due to the field symmetry.

arXiv comment6 pages, 4 figures, 2 tables

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• Exploring symmetries in photoelectron holography with two-color linearly polarized fields
• Polarization in Strong-Field Ionization of Excited Helium
• Semiclassical strong-field theory of phase delays in $\omega -2\omega$ above-threshold ionization
• Influence of catastrophes and hidden dynamical symmetries on ultrafast backscattered photoelectrons
• Femtosecond pulse parameter estimation from photoelectron momenta using machine learning