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Near-field effect in the nonlinear resonant optics

The role of near field effect is investigated in the boundary value problem of nonlinear resonant optics at the interaction of steady quasiresonant optical radiation with the film of two-level atoms. Dynamical detuning from resonance, nonlinear index of refraction, reflected and refracted waves are analyzed on the basis of solution of closed system of integral field equation and optical Bloch equations with account for discrete-continuous distribution of two-level atoms. An essential dependence of near field effect upon type of symmetry of atomic distribution is shown.