Dynamical electron vortices in attosecond double photoionization of H2

J. M. Ngoko Djiokap, A. V. Meremianin, N. L. Manakov, L. B. Madsen, S. X. Hu, and Anthony F. Starace
Phys. Rev. A 98, 063407 – Published 7 December 2018
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Abstract

We study electron momentum vortices in single-photon double ionization of H2 by time-delayed, counter-rotating, elliptically polarized attosecond pulses propagating along k̂ either parallel or perpendicular to the molecular axis R. For k̂R, kinematical vortices occur similar to those found for He. For k̂R, we find dynamical vortex structures originating from an ellipticity-dependent interplay of Σu+1 and Πu+1 continuum amplitudes. We propose a complete experiment to determine the magnitudes and relative phase of these amplitudes by varying pulse ellipticities and time delays.

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  • Received 13 June 2018

DOI:https://doi.org/10.1103/PhysRevA.98.063407

©2018 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Authors & Affiliations

J. M. Ngoko Djiokap1, A. V. Meremianin2, N. L. Manakov2, L. B. Madsen3, S. X. Hu4, and Anthony F. Starace1

  • 1Department of Physics and Astronomy, University of Nebraska, Lincoln, Nebraska 68588-0299, USA
  • 2Department of Physics, Voronezh State University, Voronezh 394006, Russia
  • 3Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C, Denmark
  • 4Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA

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Issue

Vol. 98, Iss. 6 — December 2018

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