Sub-barrier pathways to Freeman resonances

Klaiber, Michael; Hatsagortsyan, Karen Z.; Keitel, Christoph H.

doi:10.1103/physreva.102.053105

Phys. Rev. A

2020

DOI: 10.1103/physreva.102.053105

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Sub-barrier pathways to Freeman resonances

Michael Klaiber

Karen Z. Hatsagortsyan

Christoph H. Keitel

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2022

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“…Role of bound states: The coupling of the ground and continuum states to other excited (bound) states has been analyzed in the literature for just a (very) few selected HHG spectra [44]. A partial-wave representation of the SFA amplitudes facilitates the coupling to excited states of the target and may help explain the formation and influence of (autoionizing) resonances in the HHG plateau.…”

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confidence: 99%

Strong-Field Ionization Amplitudes for Atomic Many-Electron Targets

Fritzsche

Böning

2022

Atoms

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The strong-field approximation (SFA) has been widely applied in the literature to model the ionization of atoms and molecules by intense laser pulses. A recent re-formulation of the SFA in terms of partial waves and spherical tensor operators helped adopt this approach to account for realistic atomic potentials and pulses of different shape and time structure. This re-formulation also enables one to overcome certain limitations of the original SFA formulation with regard to the representation of the initial-bound and final-continuum wave functions of the emitted electrons. We here show within the framework of Jac, the Jena Atomic Calculator, how the direct SFA ionization amplitude can be readily generated and utilized in order to compute above-threshold ionization (ATI) distributions for many-electron targets and laser pulses of given frequency, intensity, polarization, pulse duration and carrier–envelope phase. Examples are shown for selected ATI energy, angular as well as momentum distributions in the strong-field ionization of atomic krypton. We also briefly discuss how this approach can be extended to incorporate rescattering and high-harmonic processes into the SFA amplitudes.

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confidence: 99%

Strong-Field Ionization Amplitudes for Atomic Many-Electron Targets

Fritzsche

Böning

2022

Atoms

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Sub-barrier pathways to Freeman resonances

Cited by 1 publication

References 30 publications

Strong-Field Ionization Amplitudes for Atomic Many-Electron Targets

Strong-Field Ionization Amplitudes for Atomic Many-Electron Targets

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