Ionization-induced small-scaled plasma structures in tightly focused ultrashort laser pulses.
The laser-matter interaction via optical-field ionization of a medium in a tightly focused ultrashort laser pulse is investigated by finite-difference-time-domain modeling of Maxwell's equations. We show that, unlike in the case of the conventional quasioptical approach, the regime of interaction changes drastically above a certain critical angle of laser beam focusing, resulting in the generation of small-scaled plasma structures which strongly influence the local field distribution and scattering characteristics.
Efimenko
E S
ES
Institute of Applied Physics, Russian Academy of Sciences, 603950 Nizhny Novgorod, Russia.
Kim
A V
AV
Quiroga-Teixeiro
M
M