Polarization control of direct (non-sequential) two-photon double ionization of He

Authors

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

Date of this Version

7-25-2007

Comments

Published in Journal of Physics B: Atomic, Molecular and Optical Physics 40 (2007), pp. 3115– 3126; doi 10.1088/0953-4075/40/15/011 Online at http://stacks.iop.org/JPhysB/40/3115 Copyright © 2007 IOP Publishing Ltd. Used by permission.

Abstract

An ab initio parametrization of the doubly-differential cross section (DDCS) for two-photon double ionization (TPDI) from an s² subshell of an atom in a ¹S₀-state is presented. Analysis of the elliptic dichroism (ED) effect in the DDCS for TPDI of He and its comparison with the same effect in the concurrent process of sequential double ionization shows their qualitative and quantitative differences, thus providing a means to control and to distinguish sequential and non-sequential processes by measuring the relative ED parameter.