Elliptic and Circular Dichroism Effects in Two-Photon Double Ionization of Atoms

Authors

Andrei Y. Istomin, University of Nebraska - Lincoln
Evgeny Pronin, University of Nebraska - LincolnFollow
N. L. Manakov, Voronezh State UniversityFollow
S.I. Marmo, University of Nebraska - Lincoln
Anthony F. Starace, University of Nebraska-LincolnFollow

Date of this Version

9-22-2006

Comments

Published by American Physical Society. Phys. Rev. Lett. 97, 123002 (2006). Copyright © 2006 American Physical Society. Permission to use. http://link.aps.org/abstract/PRL/v97/e123002

Abstract

An ab initio parametrization of the two-photon double ionization amplitude from an s² subshell of an atom in a ¹S state is presented and used to predict two light polarization effects on photoelectron angular distributions that do not exist in single-photon double ionization: (i) elliptic dichroism and (ii) circular dichroism at equal energy sharing. Estimates for He show large magnitudes for these effects, which provide a means for polarization control of double ionization by vacuum ultraviolet light.