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- Title
Relationship between the Spectral Densities of Einstein Coefficients for Absorption and Stimulated Emission: Physical Consequences.
- Authors
Shalagin, A. M.
- 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. © 2002 MAIK “Nauka / Interperiodica”.
- Subjects
EINSTEIN field equations; SPECTRAL energy distribution
- Publication
JETP Letters, 2002, Vol 75, Issue 6, p253
- ISSN
0021-3640
- Publication type
Article
- DOI
10.1134/1.1481457