Controlling Below-Threshold Nonsequential Double Ionization via Quantum Interference.
We show through simulation that quantum interference in nonsequential double ionization can be used to control the recollision excitation with subsequent ionization (RESI) mechanism. This includes the shape, localization, and symmetry of RESI electron-momentum distributions, which may be shifted from a correlated to an anticorrelated distribution or vice versa, far below the direct ionization threshold intensity. As a testing ground, we reproduce recent experimental results by employing specific coherent superpositions of excitation channels. We examine two types of interference, from electron indistinguishability and intracycle events, and from different excitation channels. These effects survive focal averaging and transverse-momentum integration.
Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom.
A S
AS
Maxwell
Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom.
C Figueira de Morisson
CF
Faria