Guided modes in a spatially dispersive wire medium slab

Abstract

We study the guided modes in the wire medium slab taking into account both the nonlocality and losses in the structure. We show that due to the fact that the wire medium is an extremeley spatially dispersive metamaterial, the effect of nonlocality plays a critical role since it results in coupling between the otherwise orthogonal guided modes. We observe both the effects of strong and weak coupling, depending on the level of losses in the system.

Guided modes of a wire medium slab: Comparison of effective medium approaches with exact calculations

“…II, we use a new derivation to find a result very similar to that of Belov et al [21,25], albeit with generalized ε H . However, rather than the final result itself, our contribution lies in our derivation, as it allows a comprehensive exploration of guided modes in WM slabs.…”

“…(3) with an effective medium approach constructed for thicker wires and imperfect metals [19], would achieve a more generalized result. Work has recently been done on finding the WM slab modes including the effects of material losses [25]. The Fabry-Perot condition used in Eq.…”

“…This is usually the case in WM designed for the radio or microwave spectrum, but as recent WM devices are designed to operate at smaller wavelengths, it becomes harder to fabricate samples consisting of wires suspended in air. With recent interest in finding WM slab modes with a generalized dielectric background index [24,25], a closer analysis of the effect the background index is warranted. Belov et al studied WM slabs as hyperlenses [21], and derived an approach for calculating the transmission of light from one side of the lens to the other.…”

Electromagnetic wave scattering and resonances in a complex plasma

“…The presence of surface wave fields leading to the surface plasmon resonances, makes complex plasma qualitatively different from a classical electron-ion plasma (with no external fields): for electromagnetic waves with wavelengths much larger than interparticle distances, the complex plasma appears as a metamaterial (with positive permeability due to the absence of gyrotropy in the considered case) [15,31,32], either with epsilon near zero or epsilon very large [33] (there are also analogies between magnetized plasma and metamaterial wire medium [34,35] In a complex dusty plasma, chaotic as well as ordered arrangement of dust particles is possible [36], with interesting phase transitions between ordered and disordered phases [37,38]. The particle ordering will affect the metamaterial properties of complex plasma (wave propagation and scattering) if space dispersion effects are included.…”

Super-collimation of the radiation by a point source in a uniaxial wire medium

“…Such tools make possible, for instance, the study of the wave propagation in wire medium slabs [7,[27][28][29] and solving source-free spectral problems for the natural modes in closed analytical form [30][31][32]. However, the study of the problem of radiation by localized sources embedded in a wire medium background was somehow on the back burner for a long time.…”