Photon Echoes in Multilevel Systems

Alexander A. Makarov, K. A. Antonova

The effect of photon echo is studied in several multilevel systems with quasi-equidistant spectra. The analysis focuses on the echo schemes that are of interest for femtosecond photon echo experiments involving both fundamental and combination vibrational modes of molecules.

A.I. Alekseyev, Ashat M. Basharov, Igor V. Yevseyev

Masaki Aihara, Humio Inaba

A. Yu. Parkhomenko, С. В. Сазонов

The photon echo excitated in a multilevel quantum medium by two or more ultimately short pulses with duration down to one period of optical oscillations is studied theoretically. It is shown that the number of echo responses formed in the system depends on the number of quantum levels covered by the spectrum of the exciting pulses and strongly increases with this number. General equations for the spatio-temporal characteristics of the multipulse echo signals are obtained.

Px Ye, Pm Fu

Alexei A. Kalachev, Самарцев Виталий Владимирович, D. D. Vlasova

The paper is devoted to the phenomenon of a long-lived photon echo (LLPE). The graphical method of calculation of optical echo signals in multilevel systems is developed. Using developed method the formation of LLPE signals in Van Vleck paramagnets is investigated.