Gyrotropic-Nihility in Ferrite-Semiconductor Composite in Faraday Geometry

Abstract

Abstract-The reflection, transmission spectra and the polarization transformation of linearly polarized waves in the ferrite-semiconductor multilayer structure are considered. In the long-wavelength limit, the effective medium theory is applied to describe the studied structure as a uniaxial anisotropic homogeneous medium defined by the effective permittivity and effective permeability tensors. The investigations are carried out in the frequency band where the real parts of the diagonal elements of both the effective permittivity and permeability tensors are close to zero. In this frequency band the studied structure is referred to a gyrotropic-nihility medium. An enhancement of polarization rotation, impedance matching, backward propagation are revealed.

Coexistence of bulk and surface polaritons in a magnetic-semiconductor superlattice influenced by a transverse magnetic field

“…(1b) changes its sign. The state µ v = ε v = 0 is considered as a crossing point between these two parameters combinations [32,[39][40][41] (in literature this effect is also known as the mode crossing/anti-crossing effect [42,43]). In the bottom part of Fig.…”

Dispersion peculiarities of hybrid modes in a circular waveguide filled by a composite gyroelectromagnetic medium

“…Nowadays, the main research efforts in the field of circular gyrotropic waveguides are aimed at utilization of modern artificial gyrotropic composites as the waveguide filling [16][17][18] including those suitable for transmission in the range of terahertz waves [19][20][21][22]. The theory of such artificial materials involves simultaneous presence of both gyromagnetic and gyroelectric effects [23][24][25][26][27][28][29] in order to reach a wide diversity of electromagnetic features of waveguide systems. It should be noted, in the subject field of interest, in recent years such gyroelectromagnetic composites are usually considered within the conception of metamaterials, in the framework of which they are widely discussed from the viewpoint of achieving below-cutoff and backward waves propagation in miniaturized circular waveguides [30][31][32][33][34].…”

Gyrotropic-nihility state in a composite ferrite-semiconductor structure

“…As an alternative, a layered heterostructure can be considered [17,21,22]. It is constructed by periodically arranging into a certain uniform system of gyroelectric (semiconductor) and gyromagnetic (ferrite) layers, provided that these layers are optically thin and their underlying materials correspondingly have epsilon-near-zero and mu-near-zero states in the same frequency range.…”