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Institute of Optics

bar_yell

Double optical resonance

R. M. Whitley and C. R. Stroud, Jr.

Phys. Rev. A 14, 1498 (1976).


The theoretical treatment of a three-level atom interacting with two near-resonant monochromatic fields is discussed. The applied fields are assumed to have constant intensity after being turned on at time zero. It is assumed that the only damping present is natural radiative decay. Full QED equations of motion are derived and complete dynamic solutions of the equations are developed. Specific examples of absorption and emission spectra are discussed in detail, the absorption spectrum showing strong dependence on the incident field strengths and detunings. Emission spectrum for an atom in the presence of strong fields is shown to have three side bands on either side of the central peak symmetrically located with respect to it, but the whole spectra being asymmetric because the intensities of the symmetrically placed side bands are not equal. It is shown that for certain values of the atomic decay constants the average population in the highest excited state can exceed one half, and that in the limit of strong exactly resonant fields the ratios of the line intensities for the lower transition depend only on the interaction energies while those for the upper transition only on the decay constants.


Click here to download the .pdf version of the paper whitley761.pdf (2.88 MB)


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