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Atto Fridays 

Seminar Series


​09 December 2022

The Coulomb lense in strong-field ionization

Simon Brennecke
Leibniz University Hannover, Germany

[email protected]

Interference in photoelectron momentum distributions from strong-field ionization is often interpreted by means of electron trajectories. We show that Coulomb focusing forces certain trajectories through focal points and therefore leads to phase changes (analogous to the Gouy phase in optical beams). In semiclassical modeling, these focal-point effects are encoded in a prefactor of the exponentiated action which affects both the weight and the phase of each trajectory. We demonstrate a scheme based on clustering algorithms that enable a simple classification of electron orbits and, hence, the correct implementation of the semiclassical propagator for various laser-field geometries.

[1] Simon Brennecke et al Phys. Rev. Lett. 129, 213202, 2022
[2]
Simon Brennecke et al Phys. Rev. Lett. 124, 153202, 2020


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