Abstract

We recently developed a new theoretical tool, analytical R-matrix (ARM) [1], adopting the R-matrix approach developed in [2] for collision processes and nuclear resonance reactions, to study strong field ionisation processes in circularly polarised fields. Our method can consistenly include the effects of arbitrary, long-range potentials on the ionisation process and thus focus on non-adiabatic dynamics. One application within this new scheme is the ability to time multiphoton ionisation process on attosecond scale using the spin-orbit interaction of the ionising electron with the core as the clock.

© 2013 IEEE