Bulletin of the American Physical Society
53rd Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Volume 67, Number 7
Monday–Friday, May 30–June 3 2022; Orlando, Florida
Session U07: Chiral Matter and Chiral Light
2:00 PM–3:48 PM,
Thursday, June 2, 2022
Room: Salon 5/6
Chair: Loren Greenman, Kansas State
Abstract: U07.00007 : Ionization of co- and counter-rotating electrons in ultrashort circularly polarized laser pulses*
3:12 PM–3:24 PM
Presenter:
Spencer R Walker
(JILA and Department of Physics, University of Colorado, Boulder)
Authors:
Spencer R Walker
(JILA and Department of Physics, University of Colorado, Boulder)
Lucas Kolanz
(JILA and Department of Physics, University of Colorado, Boulder)
Joel A Venzke
(JILA and Department of Physics, University of Colorado, Boulder)
Andreas Becker
(JILA and Department of Physics, University of Colorado, Boulder)
We have studied ionization of atoms with non-zero orbital angular momentum by an intense circularly polarized laser as a function of wavelength [1,2]. Numerical solutions of the time-dependent Schrodinger equation show a change by two orders of magnitude in the emission probability of counter- over co-rotating electrons in the few-photon ionization regime due to differences in the accessible ionization pathways and intermediate resonances. To gain further insights, we use time independent Floquet formalism to determine the dependence of the ionization probabilities on Stark resonances associated with the magnetic quantum number of an initial state. This provides a prediction of the maximum degree of orbital polarization in terms of single active electron parameters.
[1] S. Walker, L. Kolanz, J. Venzke, and A. Becker, Phys. Rev. A 103, L061101 (2021).
[2] S. Walker, L. Kolanz, J. Venzke, and A. Becker, Phys. Rev. Research 3, 043501 (2021).
*This work was supported by a grant from the U.S. Department of Energy, Division of Chemical Sciences, Atomic, Molecular and Optical Sciences Program (Award No. DE-SC0001771).
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