Основан в 1907 году
в России и за рубежом
The propagation of electromagnetic TM waves with a harmonically modulated dielectric slab in a regular waveguide is investigated. A derivation is given of the Fresnel formula and of the reflection and transmissioncoefficients for the nonuniform slab in the vicinity of the first order Bragg frequencies for which there is a "strong" (resonant) interaction between the signal wave and the modulated slab. A solution is obtained for the special case for which the modulated slab is located in unbounded spfce.