Pulse mode of two-frequency resonance in lambda-scheme of degenerate quantum transitions

Abstract

The results of a theoretical study of the process of joint propagation of two elliptically polarized laser pulses resonantly interacting with quantum transitions in a lambda -scheme of degenerate energy levels are reported. The cases of a weak high-frequency field, in which the phenomenon of electromagnetically induced transparency occurs, and the case of a powerful high-frequency field, are considered. It is shown that for both situations there are optimal conditions imposed on the input pulses of interacting radiation, under which the high-frequency field pulse experiences the least absorption and distortion in the medium. The first condition imposes a certain relation-ship on the eccentricities of the polarization ellipses of the input fields. The second, less essential condition is the parallelism of the main axes of these ellipses. Both conditions are suggested by the theory of normal modes of electromagnetically induced transparency in the lambda-scheme under consideration. Numerical simulation has shown that the above conditions are quite well applicable not only in the case of weak high-frequency radiation, but also in the case when high-frequency and low-frequency pulses have comparable peak intensities at the entrance to the me-dium.

Speaker

Oleg M. Parshkov
Yuri Gagarin State Technical University of Saratov, Russia, Saratov, 410054, ul. Politekhnicheskaya, 77
Russia

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