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Soviet Journal of Quantum Electronics

Resonance ionization of atoms in a strong spatially inhomogeneous electromagnetic field

A. I. Andryushin, Mikhail Vladimirovich Fedorov

Published Apr 30, 1980• 1 citation
Publisher

Abstract

An investigation is made of the influence of spatial inhomogeneity of the electromagnetic field on the process of resonance ionization of atoms. It is shown that the result of averaging over the spatial distribution of the field depends on the mechanism for formation of a dispersion dependence of the ionization probability on the radiation frequency. For all known initiating mechanisms, analytic expressions are derived to determine the line profile of the dispersion curve in a spatially inhomogeneous field having a Gaussian distribution over the transverse coordinate. It is found that if the extreme value of the energy shift of the transition due to the dynamic Stark effect αF02 is greater than the width of the dispersion curve in a homogeneous field, allowance for spatial inhomogeneity results in additional broadening of the dispersion curve, its actual order-of-magnitude width being αF02.

DOI
10.1070/qe1980v010n04abeh010114

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The correlation of inhomogeneous broadening at various frequency transitions in three-level systems is investigated, as is its effect on the intensity of a stimulated photon echo. It is shown that the correlation coefficient of inhomogeneous broadening at two different transitions and the response intensity of the stimulated photon echo depend on the parameter of the random interaction of an optical electron with a local field, as well as on the distribution width of additional frequency shifts owing to a partial fixation of transition energies. In this case, an insignificant variation of the correlation coefficient results in a considerable decrease in the response intensity.