Denys M. Natarov

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We study numerically the effect of periodicity on the plasmon-assisted scattering and absorption of visible light by infinite and finite gratings of circular silver nanowires. The infinite grating is a convenient object of analysis because of the possibility to reduce the scattering problem to one period. We use the well-established method of partial(More)
We consider the <i>H</i> -polarized plane wave scattering by a finite linear grating of circular silver wires using the angular field expansions in local coordinates and addition theorems for cylindrical functions. The study is focused on the influence of the plasmon and the grating resonances on each other. It demonstrates that the scattering per one(More)
We consider the two-dimensional (2-D) problem of the H-polarized plane wave scattering by a linear chain of silver nanowires in a cloud of similar pseudo-randomly located wires, in the visible range. Numerical solution uses the field expansions in local coordinates and addition theorems for cylindrical functions and has a guaranteed convergence. The total(More)
The problem of the H-polarized wave scattering by finite chains of circular nanowires is considered. A two-dimensional diffraction problem with rigorous boundary conditions is solved by partial separations of variables method using local polar coordinates of each scatterer. The obtained results demonstrate convergence of the algorithm and good agreement(More)
Presented are preliminary results related to two electromagnetic-wave problems: of the plane-wave scattering by a silver strip placed into a circular dielectric shell and of the wave emission by the same strip inserted into a quantum wire (QW), in the optical range. Auxiliary analysis is focused on the wavelength dependence of the total scattering(More)
We present a mini-review on the discovery, nature and characterization of the specific family of natural modes existing on periodic arrays of both dielectric and metallic sub-wavelength scatterers, and the corresponding to them resonances in the optical-range wave scattering and absorption. These grating modes (G-modes) have been studied analytically for(More)
Considered is the two-dimensional (2-D) source-free problem of the H-polarized electromagnetic field in the presence of a silver circular cylindrical nanowire coated with a concentric layer of active material. We assume that the natural-mode frequency is real-valued and find it together with the corresponding threshold value of material gain in the active(More)
We present the results of numerical simulation of the scattering of the H-polarized electromagnetic wave by a finite grating made of dielectric nanowires, in the visible range of light. Numerical solution uses the field expansions in local coordinates of each wire and addition theorems for cylindrical functions and has a guaranteed convergence. Numerical(More)
The scattering of the H-polarized wave by single- and double-layer grids of circular silver nanowires is considered. The obtained results demonstrate the presence of plasmon and grid resonances in such grids. These resonances are found and computed for the grids of a large number of wires. Extraordinary resonance enhancement is discovered if both kinds of(More)
We consider the two-dimensional (2-D) scattering of the H-polarized plane wave by three discrete configurations made of periodically arranged circular cylindrical wires, using the field expansions in local coordinates and addition theorems for cylindrical functions. Resulting block-type matrix equation is cast to the Fredholm second-kind form that(More)