Ionization-induced gas transparency in the resonance electromagnetic field

К. А. Баранцев, Г. В. Волошин, A. N. Litvinov +1 more

Enrique Conejero Jarque, L. Roso

Based on ab initio simulations of the interaction of the hydrogen atom with a multifrequency ultrashort laser pulse in the strong-field regime, coherent population trapping is found. It leads to the inhibition of the ionization process and, hence, electromagnetically induced transparency, provided that certain two-photon resonance conditions are satisfied. This effect opens additional possibilities to detect phase-locked trains of attosecond pulses.

Thuan Bui Dinh, Van Cao Long, W. Leoński +1 more

A Λ-like model of atomic levels involving two auto-ionizing states is considered. The levels are irradiated by two external electromagnetic fields, a strong driving and a weak probing ones. The analytical formula for medium susceptibility shows an additional electromagnetically induced transparency window caused by the second auto-ionizing level. Characteristics of both transparency windows are analyzed depending on parameters of auto-ionizing levels and the external driving field. Manipulation of these characteristics seems to be very effective because of their large sensitivity with respect to the parameters involved in the problem. This manipulation becomes even more feasible when considered model is implemented in so-called laser-induced continuum structure.

Xue Mei Su, Po Dong, Jinwei Gao +1 more

Th. V. Ionescu, Artur Ionescu