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Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE

Effect of nearby level on kinetics of superradiance of thin layer: the local-field regime

Igor Viktorovich Ryzhov, А. И. Зайцев

Published Nov 15, 2001• 0 citations
Publisher

Abstract

Under analysis is the influence of the local field upon the competition of transitions in the process of superradiance from incompletely excited thin layer of three level atoms ((Lambda) -diagram of the operating transitions). It is highlighted that while the upper sublevel of the lower doublet starts degenerating, there is a superradiant regime, where the combinative transition leads the development of the superradiance pulse, and the time of the pulse delay depends on the parameters of the local field and splitting of the lower doublet.

DOI
10.1117/12.447984

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Under analysis is the influence of the local field upon the competition of transitions in the process of superradiance from incompletely excited thin layer of three level atoms ((Lambda) -diagram of the operating transitions). It is highlighted that while the upper sublevel of the lower doublet starts degenerating, there is a superradiant regime, where the combinative transition leads the development of the superradiance pulse, and the time of the pulse delay depends on the parameters of the local field and splitting of the lower doublet.
A cavity-like regime of superradiance for a double-layer medium populated by atoms with the A-scheme of transitions is considered in a semiclassical approximation under the condition that the layers are arranged symmetrically with respect to initial characteristics of the field and atomic system populating the layers. An analytical law for the linear stage of the superradiance process is found that agrees well with numerical solution of the differential equations of the model under consideration for any initial conditions nearly up to the peak of the appropriate characteristic of the field intensity module. For the case of degenerate lower doublet, the resonant character of the dependence of the superradiance pulse time delay on the distance between the layers is studied.