The analytical approach to the computing of resonance effects for the diffraction at well reflecting gratings


  • N. A. Balakhonova Kharkiv Military University, Ukraine
  • A. V. Kats Kharkiv Military University, Ukraine
  • I. S. Spevak Kharkiv Military University, Ukraine



The electromagnetic radiation scattering by diffraction grating possesses many peculiarities under condition of resonance diffraction  *, where  * is the grating wavevector,  * is tangential wavevector's component of the incident wave, mis integer. E.g., these are great increase of the resonance spectra amplitude, transformation of polarization, suppression of specular reflection. These phenomena have the same nature as well-known Wood anomalies, and they are caused by resonance of the grazing spectra and eigenmode of a highly conductive surface — the surface electromagnetic wave (SEW). Many works in recent years have been devoted to experimental and theoretical investigations of resonance diffraction (see, e.g., [1-3]). In order to explain strong resonance effects complicated numerical calculations are used [4, 5]. The essential simplification is made in this paper. It is based on modified perturbation theory (see [6, 7]).


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