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arXiv · 1911.00290

Electron rotational asymmetry in strong-field photodetachment from F$^-$ by circularly polarized laser pulses

G. S. J. Armstrong·D. D. A. Clarke·A. C. Brown·H. W. van der Hart
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Abstract

We use the $R$-matrix with time-dependence method to study detachment from F$^-$ in circularly-polarized laser fields of infrared wavelength. By decomposing the photoelectron momentum distribution into separate contributions from detached $2p_1$ and $2p_{-1}$ electrons, we demonstrate that the detachment yield is distributed asymmetrically with respect to these initial orbitals. We observe the well-known preference for strong-field detachment of electrons that are initially counter-rotating relative to the field, and calculate the variation in this preference as a function of photoelectron energy. The wavelengths used in this work provide natural grounds for comparison between our calculations and the predictions of analytical approaches tailored for the strong-field regime. In particular, we compare the ratio of counter-rotating electrons to corotating electrons as a function of photoelectron energy. We carry out this comparison at two wavelengths, and observe good qualitative agreement between the analytical predictions and our numerical results.

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G. S. J. Armstrong, D. D. A. Clarke, A. C. Brown, H. W. van der Hart. 2019-11-01. Electron rotational asymmetry in strong-field photodetachment from F$^-$ by circularly polarized laser pulses. https://doi.org/10.1103/physreva.99.023429

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