Molecular Symmetry-Mixed Dichroism in Double Photoionization of H₂

Authors

Jean Marcel Ngoko Djiokap, University of Nebraska-LincolnFollow
Alexei V. Meremianin, Voronezh State University, Voronezh, RussiaFollow
N. L. Manakov, Voronezh State University, Universitetskaya pl. 1, Voronezh, 394006 RussiaFollow
L. B. Madsen, Aarhus University
S. X. Hu, University of Rochester
Anthony F. Starace, University of Nebraska-LincolnFollow

ORCID IDs

J. M. Ngoko Djiokap https://orcid.org/0000-0003-4702-3544

Anthony F. Starace https://orcid.org/0000-0001-7261-9329

Date of this Version

2019

Citation

PHYSICAL REVIEW LETTERS 123, 143202 (2019)

DOI: 10.1103/PhysRevLett.123.143202

Comments

© 2019 American Physical Society

Abstract

Dichroism in double photoionization of H₂ molecules by elliptically polarized extreme ultraviolet pulses is formulated analytically as a sum of atomiclike dichroism (AD) and molecular symmetry-mixed dichroism (MSMD) terms. The MSMD originates from an interplay of ¹Σ⁺_u and ¹Π⁺_u continuum molecular ionization amplitudes. For detection geometries in which the AD vanishes, numerical results for the sixfold differential probabilities for opposite pulse helicities show that the MSMD is significant in the electron momentum and angular distributions and is controllable by the ellipticity.