Abstract
A refraction of short pulses by a thin film of atoms at two- photon resonance is numerically considered with the process of third harmonic generation involved in analysis. It is shown that a light pulse, being refracted by a tin film of resonance atoms, decays into subpulses, which number is determined by the energy penetrated in the film. The process depends on the angle of incidence. The variation of the resonance detuning allows compensating Stark effect and creating the preferable conditions for light pulse transmission. The effect of local field is similar in its action to the Stark effect, but its contribution to the frequency shift could be significant only in the media with greater concentration of the resonance atoms.
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