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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2002, Volume 75, Issue 6, Pages 301–305
(Mi jetpl3056)
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This article is cited in 9 scientific papers (total in 9 papers)
ATOMS, SPECTRA, RADIATIONS
Relationship between the spectral densities of Einstein coefficients for absorption and stimulated emission: Physical consequences
A.M. Shalagin Institute of Automation and Electrometry, Siberian Branch of Russian Academy of Sciences, Novosibirsk
Abstract:
The spectral densities of Einstein coefficients for absorption and stimulated emission in a two-level quantum system are not equal to each other beyond the absorption (emission) line if the homogeneous broadening caused by interaction with a thermostat is much larger than the natural width. In this study, a relationship between these coefficients is derived on the basis of general thermodynamic requirements. This relationship is associated with new effects such as population inversion upon the nonresonant absorption of continuous radiation and radiation amplification without population inversion.
Received: 28.01.2002
Citation:
A.M. Shalagin, “Relationship between the spectral densities of Einstein coefficients for absorption and stimulated emission: Physical consequences”, Pis'ma v Zh. Èksper. Teoret. Fiz., 75:6 (2002), 301–305; JETP Letters, 75:6 (2002), 253–256
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https://www.mathnet.ru/eng/jetpl3056 https://www.mathnet.ru/eng/jetpl/v75/i6/p301
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