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 2p1 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.
Original languageEnglish
Article number023429
Number of pages9
JournalPhysical Review A (Atomic, Molecular, and Optical Physics)
Volume99
Issue number2
DOIs
Publication statusPublished - 26 Feb 2019

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photodetachment
detachment
asymmetry
photoelectrons
pulses
lasers
counters
electrons
wavelengths
predictions
time dependence
momentum
orbitals
energy

Cite this

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title = "Electron rotational asymmetry in strong-field photodetachment from F- by circularly polarized laser pulses",
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 2p1 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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Electron rotational asymmetry in strong-field photodetachment from F- by circularly polarized laser pulses. / Armstrong, G. S. J.; Clarke, D. D. A. ; Brown, A. C.; Van Der Hart, H. W.

In: Physical Review A (Atomic, Molecular, and Optical Physics), Vol. 99, No. 2, 023429, 26.02.2019.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Electron rotational asymmetry in strong-field photodetachment from F- by circularly polarized laser pulses

AU - Armstrong, G. S. J.

AU - Clarke, D. D. A.

AU - Brown, A. C.

AU - Van Der Hart, H. W.

PY - 2019/2/26

Y1 - 2019/2/26

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AB - 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 2p1 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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