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Optics and Spectroscopy

Effect of the near-lying level on the kinetics of the field of superradiance of a thin layer

А. И. Зайцев, Igor Viktorovich Ryzhov

Published Aug 1, 2001• 3 citations
Publisher

Abstract

The effect of the local field on the competition of transitions in the superradiance of an incompletely excited thin layer of three-level atoms (Λ-diagram of working transitions) is studied. Analysis is made for the conditions when one of the sublevels of the lower doublet is initially unpopulated. For an initially unpopulated upper sublevel of the lower doublet, a new superradiance regime is found.

DOI
10.1134/1.1397846

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The effect of the local field on the competition of transitions in the superradiance of an incompletely excited thin layer of three-level atoms (Λ-diagram of working transitions) is studied. Analysis is made for the conditions when one of the sublevels of the lower doublet is initially unpopulated. For an initially unpopulated upper sublevel of the lower doublet, a new superradiance regime is found.
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.
We analyze the superradiant emission with and without inversion from a thin film comprised of three-level atoms with the A-scheme of operating transitions. Since the thickness of the system is assumed to be smaller than the emission wavelength, the local-field correction to the acting field becomes of great importance and affects the three-level superradiance to a large extent. Due to this correction, a competition between the operating transitions occurs, resulting under suitable conditions in the suppression of one of them.