Enhancing spin polarization using attosecond angular streaking

POSTER

Abstract

We use the R-matrix with time-dependence method [1-4] to investigate spin polarization of electrons ejected from the krypton atom by an angular streaking scheme. Through solution of the multielectron, semi-relativistic, time-dependent Schrödinger equation, we show that angular streaking produces strongly spin-polarized electrons. We find that the degree of spin polarization attainable using the angular streaking scheme exceeds that acheived using longer circularly polarized pulses. The degree of spin polarization increases with the Keldysh parameter, so that angular streaking --- ordinarily applied to investigate tunneling --- may be repurposed to generate strongly spin-polarized electron bunches. Additionally, we explore modifications of the angular streaking scheme that also enhance spin polarization.

[1] L. A. A. Nikolopoulos, J. S. Parker, and K. T. Taylor, Phys.Rev.A. 78 063420 (2008).

[2] L. R. Moore et al., J. Mod. Opt. 58 1132 (2011).

[3] D. D. A. Clarke et al., Phys.Rev.A. 98 053442 (2018).

[4] A. C. Brown et al., Comput. Phys. Commun. 250 107062 (2020).

*This work benefited from computational support by CoSeC, the Computational Science Centre for Research Communities, through CCPQ. The authors acknowledge funding from the UK Engineering and Physical Sciences Research Council (EPSRC) under grants EP/P022146/1, EP/P013953/1, EP/R029342/1, and EP/T019530/1. This work relied on the ARCHER UK National Supercomputing Service, for which access was obtained via the UK-AMOR consortium funded by EPSRC.

Publication: G S J Armstrong et al., 'Enhancing spin polarization using ultrafast angular streaking', submitted to Phys. Rev. A

Presenters

  • Gregory Armstrong

    • Queen's University Belfast

Authors

  • Gregory Armstrong

    • Queen's University Belfast

  • Daniel Clarke

    • Queen's University Belfast
    • Trinity College Dublin

  • Jakub Benda

    • Institute of Theoretical Physics, Charles University
    • Charles University

  • Jack Wragg

    • Queen's University Belfast

  • Andrew Brown

    • Queen's University Belfast

  • Hugo W van der Hart

    • Queen's University Belfast