Dynamical electron vortices in attosecond double photoionization of H₂

Journal Article · 07 December 2018 · Physical Review A

DOI: https://doi.org/10.1103/physreva.98.063407 · OSTI ID:1614597

Ngoko Djiokap, J. M. ^[1]; Meremianin, A. V. ^[2]; Manakov, N. L. ^[2]; Madsen, L. B. ^[3]; Hu, S. X. ^[4]; Starace, Anthony F. ^[5]

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

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.

• Research Organization: Univ. of Nebraska, Lincoln, NE (United States); Univ. of Rochester, NY (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA)
• Grant/Contract Number: FG03-96ER14646; NA0001944
• OSTI ID: 1614597
• Journal Information: Physical Review A, Journal Name: Physical Review A Journal Issue: 6 Vol. 98; ISSN 2469-9926
• Publisher: American Physical Society (APS)Copyright Statement
• Country of Publication: United States
• Language: English