Coherent population trapping in multilevel laser-induced continuum structure system

Abstract

We have investigated atomic coherent population trapping in a multilevel model of laser-induced continuum structure, in which a quasicontinuum of excited levels to be modeled as the Bixon-Jortner quasicontinuum is laser-embedded into a previously structureless atomic continuum. The condition leading to atomic coherent population trapping and the coherent population trapping state are given explicitly. The effects of nondegenerate detuning, the Fano factors and the laser intensities on the amount of population trapped in the atomic bound states and the populations distributed in the quasicontinuum are also examined.