Dynamical electron vortices in attosecond double photoionization of H₂

Authors

Jean Marcel Ngoko Djiokap, University of Nebraska-LincolnFollow
A. V. Meremianin, Voronezh State UniversityFollow
N. L. Manakov, Voronezh State UniversityFollow
L. B. Madsen, Aarhus UniversityFollow
S. X. Hu, University of RochesterFollow
Anthony F. Starace, University of Nebraska-LincolnFollow

Document Type

Article

Date of this Version

12-7-2018

Citation

PHYSICAL REVIEW A 98, 063407 (2018)

DOI: 10.1103/PhysRevA.98.063407

Comments

Copyright © 2018 American Physical Society. Used by permission.

Abstract

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