Spectra of bigyrotropic magnetic photonic crystals

Abstract

We calculated the photonic band gap spectra of a one‐dimensional magnetic photonic crystal made of alternating layers of bigyrotropic magnetic yttrium‐iron garnet and nonmagnetic gadolinium gallium garnet. The forbidden regimes or band gaps in the electromagnetic wave spectrum were numerically obtained for the transversal magneto‐optical configuration and compared with those for the polar and longitudinal magneto‐optical configurations. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

Transmission Spectra in Ferrite-Semiconductor Periodic Structure

“…Hence, for ω 4 < ω 5 , in the frequency range ω 1 < ω < ω 4 we have the composite with the left-handed behavior. To control the left-handed properties of the structure, we should change the external magnetic field.…”

“…These structures can easily change their characteristics in an external magnetic field. The results of theoretical investigations of spaceinhomogeneous magnetic media were presented in [1][2][3][4][5][6][7][8][9]. It was considered the reflection from the semiinfinite periodically layered structure composed of alternating semiconductor and insulator layers [10].…”

“Left-handed” state and polarization characteristics of waves in “semiconductor-magnet” superlattices

“…For semiconductor layers, permittivity tensor components have the fol lowing frequency dependence (3) where ε 0 is the lattice part of the semiconductor per mittivity, ω is the wave frequency, ω p and ω c = eH 0 /m*c is the plasma and cyclotron frequencies, e and m* are the charge and effective mass of carriers, ν is the colli sion frequency, and c is the speed of light in vacuum [1]. The frequency dependence of the tensor com ponents is usually determined empirically; for perme ability tensor components, the frequency dependence is given by (4) where ω H = γH 0 , ω M = 4πγM 0 , γ is the gyromagnetic ratio, M 0 is the saturation magnetization, and α is the damping parameter [18].…”

“…Wave properties of one dimensional photonic crys tals and periodic layered structures (PLSs) consisting of layers of materials with different properties, which can be efficiently controlled, have attracted close attention of researchers over many years [1][2][3][4][5]. The features of electromagnetic wave propagation in PLSs based on magnetic and semiconductor layers are asso ciated in many respects with gyrotropy of both mag netic and semiconductor layers and can appear in a rather wide (from microwave to optical) frequency range.…”

Terahertz response of gadolinium gallium garnet (GGG) and gadolinium scandium gallium garnet (SGGG)

“…As a substrate material, (S)GGG based heterostructures may find even more novel photonic applications. For example, alternating deposition of ultra-thin XIG and GGG films has led to the realization of all-garnet magnetooptical photonic crystals (MOPCs) [47][48][49][50][51][52][53][54][55][56][57][58][59][60][61]. Additionally, heterostructures combining (S)GGG-based garnet substrates and 2D quantum materials that exhibit giant Faraday rotations at THz frequencies [20,42,43] can potentially lead to broadband magneto-optical devices that cover the whole THz-tovisible frequency range.…”