Free polarization decay upon nonresonance excitation of three-level equidistant systems

V. S. Kuz’min

Махвиладзе Тариэль Михайлович, I. G. Sinitsyn, Leonid A. Shelepin

Alexandre V. Kats, В. М. Конторович, A. V. Nikolaev

Alexander A. Makarov, Cyrus D. Cantrell, W. H. Louisell

E. A. Gavrilenko, А. И. Зайцев

We investigate the super-radiance decay of localized excitation in the line of two-level atoms. It is demonstrated that the excitation is underradiated. The residual part forms polarization waves propagating from areas of residual excitation to the line edge.

A. I. Alekseev, O. V. Zhemerdeev

A theory of optical free-induction decay (FID) induced by two exciting light pulses in three-level atomic systems subjected to a constant magnetic field is presented. The theory takes into account the hyperfine interaction, the level degeneracy, and the dependence of the FID signal on the polarizations of the exciting pulses. An analysis of the FID signal in a magnetic field suggests new ways to measure the g factors of the levels, the hyperfine structure constants, and the relaxation rates. The results obtained are extended to include the echelon excitation of the multilevel system by a definite set of light pulses with specially chosen frequencies and polarizations.