Elliptic and circular dichroism effects in two-photon double ionization of atoms.
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.
Istomin
Andrei Y
AY
Department of Physics and Astronomy, The University of Nebraska, Lincoln, NE 68588-0111, USA.
Pronin
E A
EA
Manakov
N L
NL
Marmo
S I
SI
Starace
Anthony F
AF