Described trends in the application of two-dimensional-periodic absorbing structures in optical and THz range. The results of calculation of the scatter and reflection of multilayer structures. Designed optimal parameters of the structures to monitor the greatest effect absorption.

Keywords: resonant absorption, plasmons, reflection coefficient, diffraction gratings, periodic structures

Diffraction characteristics of the gratings are calculated by two methods - method of approximate boundary conditions and a strict method based on the numerical and analytical solution of the two-dimensional integro-differential equation. Results of the graphene diffraction gratings calculations are presented.

Keywords: graphene, graphene gratings, volume integral equations, plasmons, coefficient of reflection

In the present work a new trends in the development of absorbent materials are described. The results of calculation of scattering and reflection patterns for multilayer structures are presented. Parameters of the structures with highest absorption are evaluated. Analysis of obtained theoretical calculations is presented.

Keywords: resonance absorption, metamaterials, plasmons, nanophotonics, nanostructures, reflectance

The problem diffraction H-polarized electromagnetic pulse is reduced to the solution of the integral equation. Singled and analytically transformed into a special part of the integral equation. It transformed the integral equation applied collocation method for solving the spatial coordinate. Found near field and the results of calculations of diffraction of electromagnetic pulse.

Keywords: Fresnel diffraction, electromagnetic pulse, collocation method, a near field

The present state and development trends of plasmonic materials. The results of the calculation of scattering and reflection diagrams nanostrzhnyah of ZnO. And the prospects for the use of anti-reflective optical lattices.

Keywords: non-reflecting grating plasmonic materials, nanophotonics, nanostructures, reflectance

The optimization of multilayered one-dimensional nonlinear structure of Raman amplifier of optical signals consisted of alternate active nonlinear metal layers and passive dielectric has been studied. The amplification of the reflected and passed field energy was calculated for different structure types. The effective replacement of passive layers by active media in the middle and in the end of structure has been demonstrated.

Keywords: raman scattering, amplifier, photonic crystal, nonlinear effect, photonic bandgap

The possibility of channeling X-ray fluorescence inside the hollow microvascular at the energy of the exciting radiation in the vicinity SiL2, 3 - absorption edge has been researched. Theoretically obtained the angular distribution of the field passing through the microchannels. The calculation model of inhomogeneous waveguide layer with the generation of X-ray fluorescence inside the walls of the microchannels shows the possibility of escape of radiation at large angles.

Keywords: channeling of X-ray fluorescence, microchannel plates, focusing of X-ray radiation