Dispersion of bulk and surface electromagnetic waves in bigyrotropic finely stratified ferrite-semiconductor medium

Transmission Spectra in Ferrite-Semiconductor Periodic Structure

“…It was shown that an external field can be used to control the spectrum and characteristics of reflected waves. The peculiarities in the spectra of bulk and surface electromagnetic waves in a periodic layered ferrite-semiconductor structure in the effective (finely stratified) medium approximation for intrinsic types of waves was studied in [12]. It was shown that ferrite composites have a negative effective refraction index in some microwave frequencies.…”

Anisotropy, gyrotropy and dispersion properties of the periodical thin-layer structure of magnetic–semiconductor

“…where corresponding components of the effective tensors are defined by formulae (16), (17), (22) Table 1 (TE) and Table 2 (TM). Here, the parameter y ¼ l s =l f , defining the ratio of the semiconductor and magnetic layer thicknesses, is introduced for convenience of the further analysis.…”

“…The peculiarities of the electromagnetic wave propagation in such a structure in many respects are connected with its gyrotropy, which appears to follow the gyrotropy of magnetic and semiconductor layer and can occur in range from centimeter to submillimeter waves [13,15,16]. Gyrotropic properties of the magnetic layers can be connected with the presence of antisymmetric non-diagonal components in magnetic permeability tensor m f and (or) dielectric permittivity tensorÊ f (which depends on working frequency range).…”

“…In the case of propagation along the periodicity axis and applied longitudinal magnetic field, the normal waves are the two ones, whose transversal components of magnetic and electric fields have opposite circular polarization and their longitudinal components are vanished. For the transversal magnetic field applied to the structure, the normal waves are two linearly polarized in orthogonal plane waves and each of them has three field components [12,13,15,16]. The existence of three principal directions of the magnetic field applied relative to the structure symmetry axis and three possible directions of propagation leads to a large variety of wave characteristics that can be observed in PLS.…”

Coupled Waves in the Periodic Composite Magnetic-Semiconducting Media

“…Similarly, the study of coupled waves, e.g., Alfven-spin or helicon-spin waves in the composite materials like magnetic-semiconducting media, has been the subject of investigation for different experimental and theoretical reasons. Work has been done by various authors in this direction [8][9][10][11].…”