Advanced momentum sampling and Maslov phases for a precise semiclassical model of strong-field ionization

Mads Brøndum Carlsen; Emil Hansen; Lars Bojer Madsen; Andrew Stephen Maxwell

doi:10.1088/1367-2630/ad2410

Advanced momentum sampling and Maslov phases for a precise semiclassical model of strong-field ionization

Mads Brøndum Carlsen, Emil Hansen, Lars Bojer Madsen^*, Andrew Stephen Maxwell

^*Corresponding author for this work

Department of Physics and Astronomy

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

5 Citations (Scopus)

Abstract

Recollision processes are fundamental to strong-field physics and attoscience, thus models connecting recolliding trajectories to quantum amplitudes are a crucial part in furthering understanding of these processes. We report developments in the semiclassical path-integral-based Coulomb quantum-orbit strong-field approximation model for strong-field ionization by including an additional phase known as Maslov’s phase and implementing a new solution strategy via Monte-Carlo-style sampling of the initial momenta. In doing so, we obtain exceptional agreement with solutions to the time-dependent Schrödinger equation for hydrogen, helium, and argon. We provide an in-depth analysis of the resulting photoelectron momentum distributions for these targets, facilitated by the quantum-orbits arising from the solutions to the saddle-point equations. The analysis yields a new class of rescattered trajectories that includes the well-known laser-driven long and short trajectories, along with novel Coulomb-driven rescattered trajectories. By virtue of the precision of the model, it opens the door to detailed investigations of a plethora of strong-field phenomena such as photoelectron holography, laser-induced electron diffraction and high-order above threshold ionization.

Original language	English
Article number	023025
Journal	New Journal of Physics
Volume	26
Issue	2
ISSN	1367-2630
DOIs	https://doi.org/10.1088/1367-2630/ad2410
Publication status	Published - 1 Feb 2024

Keywords

improved Coulomb quantum-orbit strong-field approximation
semi-classical theory
strong-field ionization

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10.1088/1367-2630/ad2410

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title = "Advanced momentum sampling and Maslov phases for a precise semiclassical model of strong-field ionization",

abstract = "Recollision processes are fundamental to strong-field physics and attoscience, thus models connecting recolliding trajectories to quantum amplitudes are a crucial part in furthering understanding of these processes. We report developments in the semiclassical path-integral-based Coulomb quantum-orbit strong-field approximation model for strong-field ionization by including an additional phase known as Maslov{\textquoteright}s phase and implementing a new solution strategy via Monte-Carlo-style sampling of the initial momenta. In doing so, we obtain exceptional agreement with solutions to the time-dependent Schr{\"o}dinger equation for hydrogen, helium, and argon. We provide an in-depth analysis of the resulting photoelectron momentum distributions for these targets, facilitated by the quantum-orbits arising from the solutions to the saddle-point equations. The analysis yields a new class of rescattered trajectories that includes the well-known laser-driven long and short trajectories, along with novel Coulomb-driven rescattered trajectories. By virtue of the precision of the model, it opens the door to detailed investigations of a plethora of strong-field phenomena such as photoelectron holography, laser-induced electron diffraction and high-order above threshold ionization.",

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author = "Carlsen, {Mads Br{\o}ndum} and Emil Hansen and Madsen, {Lars Bojer} and Maxwell, {Andrew Stephen}",

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doi = "10.1088/1367-2630/ad2410",

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Advanced momentum sampling and Maslov phases for a precise semiclassical model of strong-field ionization. / Carlsen, Mads Brøndum; Hansen, Emil ; Madsen, Lars Bojer et al.
In: New Journal of Physics, Vol. 26, No. 2, 023025, 01.02.2024.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

TY - JOUR

T1 - Advanced momentum sampling and Maslov phases for a precise semiclassical model of strong-field ionization

AU - Carlsen, Mads Brøndum

AU - Hansen, Emil

AU - Madsen, Lars Bojer

AU - Maxwell, Andrew Stephen

PY - 2024/2/1

Y1 - 2024/2/1

N2 - Recollision processes are fundamental to strong-field physics and attoscience, thus models connecting recolliding trajectories to quantum amplitudes are a crucial part in furthering understanding of these processes. We report developments in the semiclassical path-integral-based Coulomb quantum-orbit strong-field approximation model for strong-field ionization by including an additional phase known as Maslov’s phase and implementing a new solution strategy via Monte-Carlo-style sampling of the initial momenta. In doing so, we obtain exceptional agreement with solutions to the time-dependent Schrödinger equation for hydrogen, helium, and argon. We provide an in-depth analysis of the resulting photoelectron momentum distributions for these targets, facilitated by the quantum-orbits arising from the solutions to the saddle-point equations. The analysis yields a new class of rescattered trajectories that includes the well-known laser-driven long and short trajectories, along with novel Coulomb-driven rescattered trajectories. By virtue of the precision of the model, it opens the door to detailed investigations of a plethora of strong-field phenomena such as photoelectron holography, laser-induced electron diffraction and high-order above threshold ionization.

AB - Recollision processes are fundamental to strong-field physics and attoscience, thus models connecting recolliding trajectories to quantum amplitudes are a crucial part in furthering understanding of these processes. We report developments in the semiclassical path-integral-based Coulomb quantum-orbit strong-field approximation model for strong-field ionization by including an additional phase known as Maslov’s phase and implementing a new solution strategy via Monte-Carlo-style sampling of the initial momenta. In doing so, we obtain exceptional agreement with solutions to the time-dependent Schrödinger equation for hydrogen, helium, and argon. We provide an in-depth analysis of the resulting photoelectron momentum distributions for these targets, facilitated by the quantum-orbits arising from the solutions to the saddle-point equations. The analysis yields a new class of rescattered trajectories that includes the well-known laser-driven long and short trajectories, along with novel Coulomb-driven rescattered trajectories. By virtue of the precision of the model, it opens the door to detailed investigations of a plethora of strong-field phenomena such as photoelectron holography, laser-induced electron diffraction and high-order above threshold ionization.

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Advanced momentum sampling and Maslov phases for a precise semiclassical model of strong-field ionization

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