This article is cited in 23 papers

Physical basis of quantum electronics

Role of a high gain of the medium in superradiance generation and in observation of coherent effects in semiconductor lasers

P. P. Vasil'ev

P. N. Lebedev Physical Institute, Russian Academy of Sciences, Moscow

Abstract: A theoretical model of superradiant pulse generation in semiconductor laser structures is developed. It is shown that a high optical gain of the medium can overcome phase relaxation and results in a built-up superradiant state (macroscopic dipole) in an assembly of electron—hole pairs on a time scale much longer than the characteristic polarisation relaxation time T₂. A criterion of the superradiance generation is the condition αc_mT₂ > 1, where α is the gain coefficient and c_m is the speed of light in the medium. The theoretical model describes both qualitatively and quantitatively the author's own experimental results.

PACS: 42.55.Px, 42.50.Fx

Received: 26.05.1999

 English version: Quantum Electronics, 1999, 29:10, 842–846

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