Elliptic and circular dichroism effects in two-photon double ionization of atoms.

Phys Rev Lett

Department of Physics and Astronomy, The University of Nebraska, Lincoln, NE 68588-0111, USA.

Published: September 2006

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.

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http://dx.doi.org/10.1103/PhysRevLett.97.123002DOI Listing

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