Title: Dynamical electron vortices in attosecond double photoionization of H₂

Abstract

We study electron momentum vortices in single-photon double ionization of H₂ by time-delayed, counter-rotating, elliptically polarized attosecond pulses propagating along kˆ either parallel or perpendicular to the molecular axis R. For ˆk∥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 ¹Σ$$^{+}_{u}$$ and ¹Π$$^{+}_{u}$$ continuum amplitudes. Furthermore, we propose a complete experiment to determine the magnitudes and relative phase of these amplitudes by varying pulse ellipticities and time delays.

Authors:

Ngoko Djiokap, J. M. ^[1]; Meremianin, A. V. ^[2]; Manakov, N. L. ^[2]; Madsen, L. B. ^[3]; Hu, S. X. ^[4]; Starace, Anthony F. ^[1]

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+ Show Author Affiliations

1. Univ. of Nebraska, Lincoln, NE (United States)
2. Voronezh State Univ. (Russia)
3. Aarhus Univ. (Denmark)
4. Univ. of Rochester, NY (United States)

Publication Date:

Fri Dec 07 00:00:00 EST 2018

Research Org.:

Univ. of Nebraska, Lincoln, NE (United States); Univ. of Rochester, NY (United States)

Sponsoring Org.:

USDOE National Nuclear Security Administration (NNSA)

OSTI Identifier:

1614597

Alternate Identifier(s):

OSTI ID: 1484970

Grant/Contract Number:  

FG03-96ER14646; NA0001944

Resource Type:

Accepted Manuscript

Journal Name:

Physical Review A

Additional Journal Information:

Journal Volume: 98; Journal Issue: 6; Journal ID: ISSN 2469-9926

Publisher:

American Physical Society (APS)

Country of Publication:

United States

Language:

English

Subject:

74 ATOMIC AND MOLECULAR PHYSICS; Optics; Physics; Coherent control; Electronic structure of atoms & molecules; Light-matter interaction; Single- and few-photon ionization & excitation; Ultrafast phenomena