Resonant Scattering of Electromagnetic Wave by Stripe Grating Backed With a Layer of Metamaterial

Abstract

Abstract-Scattering of electromagnetic waves by periodic stripe grating backed with a layer of metamaterial is considered. The distinguished feature of the structure is the association of periodicity of two scales: Micro scale that is the scale characteristic to metamaterial of the layer, and the scale of periodic metal stripe grating that is of the scale of wavelength of incident electromagnetic field. Such association gives rise to new type of resonant phenomena such as "crowding" of resonant transmission/reflection peaks in the vicinity of characteristic frequencies of the structure. The study of the problem is performed on the base of rigorous and accurate solution to the diffraction and spectral problems, which guarantees the robustness of numerical algorithm; and allows asymptotical analytical analysis of the problem and prediction of various resonant phenomena.

Interaction of a plane electromagnetic wave with a structure consisting of a strip grating, a metamaterial layer, and magnetized plasma: resonance effects and their interpretation

“…The results of the above-cited works prove that the periodic grating with metamaterial is an open resonant structure that has a certain spectrum of eigenfrequencies. This fact is also confirmed by the results of [14], where the structure consisting of a ribbon grating on a layer of a metamaterial, which has an efficient dielectric permittivity of ε(ω) = 1 − ω 2 p /[ω (ω + iν)], where ω p is the typical frequency determined by the parameters of the structural elements that comprise the metamaterial and ν is the attenuation parameter, was used as an example to show that this structure is an open resonator. It was found that the spectrum of complex eigenfrequencies of such a resonator has a finite condensation point that lies at ω = ω p / √ 2, and the corresponding eigenoscillations have high diffraction Q-factors.…”

“…Such peculiarities of this resonant structure open up great prospects for its application in the non-destructive test techniques and diagnostics of various substances and materials, specifically, for determination of the parameters of plasma-like media. This paper presents the results of studying the resonant effects when a plane uniform wave excites the above-specified open resonator (see [14]) situated at the boundary of a half-space filled with magnetized plasma. It is shown that the amplitude-frequency characteristic of such a resonator with plasma contains several series of resonance frequencies with condensation points lying at certain finite frequencies that depend on the plasma parameters.…”

“…An important stage of such studies is the analysis of resonance effects that take place when monochromatic electromagnetic waves interact with one-dimensionally periodic structures containing metamaterials. For example, the study of electrodynamic properties of such materials in combination with various periodic structures, e.g., ribbon gratings, refractive diffraction gratings, periodically modulated boundaries of the metamaterial, has revealed the possibility of resonance absorption of the energy of the electromagnetic waves which are incident on them [11][12][13][14][15]. This effect has demonstrated great prospects for seeking for the regimes of resonance excitation of plane waves by the diffraction grating with metamaterial when the grating is excited by an electron beam [16].…”

Spherical Slotted Antenna Coated With Double Layer of Materials Having Combinations of Singly and Doubly Negative Parameters and Consequences of Mode Resonances

“…There had also been studies of anomalous scattering by conducting cylinders coated with metamaterials [9]. Works associated with the studies of unusual resonances caused by metamaterials [10] for achieving improved efficiencies [11], strong field localization [12], and even microwave filtering in waveguides [13] were also conducted. Other interesting applications have also been considered and studied, and a good summary of them can be viewed in recent manuscripts [14][15][16].…”

Angular Dependence of Wave Reflection in a Lossy Single-Negative Bilayer

“…With the existence of some novel and unique electromagnetic wave properties, electromagnetic metamaterials (MTMs) have recently attracted much attention [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. In contrast to the conventional materials with their electromagnetic properties being derived from the microscopically atomic and molecular viewpoints, the electromagnetic material parameters of MTMs are effectively obtained based on the artificially manufactured structures.…”