Power broadening of a diffusion resonance

D. A. Shapiro, Mikhail Stepanov

Research output: Contribution to journalArticle

Abstract

We derive an expression in terms of cylinder functions for the shape of a nonlinear resonance in a two-level system with a rapidly decaying level. We show that when the natural linewidth is negligible, the square of the total width is the sum of squares of the power and diffusion widths. The traditional variational approximation yields a correct value for the full width at half maximum, but distorts the line profile. We derive a formula for the absorbed power as a function of the incident wave intensity for comparable power and diffusion broadening. The formula is found to be valid for a power width that is small or large compared to the diffusion width, and in a new intermediate domain where homogeneous saturation becomes inhomogeneous.

Original languageEnglish (US)
Pages (from-to)888-896
Number of pages9
JournalJournal of Experimental and Theoretical Physics
Volume86
Issue number5
StatePublished - May 1998
Externally publishedYes

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saturation
profiles
approximation

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  • Physics and Astronomy(all)

Cite this

Power broadening of a diffusion resonance. / Shapiro, D. A.; Stepanov, Mikhail.

In: Journal of Experimental and Theoretical Physics, Vol. 86, No. 5, 05.1998, p. 888-896.

Research output: Contribution to journalArticle

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