Theoretical investigation of optical properties and Faraday rotation of one-dimensional periodic structure of magneto-optical material with a defect electro-optical material for the supported Tamm plasmon polaritons

In this paper, we theoretically investigate the optical characteristics and Faraday rotation of the one-dimensional photonic structure (1-DPS) consisting of magneto-optical (MO) and dielectric (SiO 2 ) materials containing a defect layer of electro-optical (EO) material using a 4 × 4 Berremann matrix method. The proposed defect layer inside 1-DPS is sandwiched of EO material by ITO layers. The anisotropic materials in the periodic structure, the magneto-optical and electro-optical layers are considered as cerium-substituted yttrium iron garnet (Ce:YIG) and lithium niobate (LiNbO 3 ), respectively. The Ce:YIG (MO) and LiNbO 3 (EO) materials have magnetic-field- and voltage-dependent responses such as dielectric indices of EO and MO materials. The optical properties are affected with external fields. The hybrid modes or Tamm plasmons polaritons (TPPs) modes appear at the interfaces in the periodic structure. Therefore, the transmission characteristics as well as Faraday rotation ( θ F ∘ ) and ellipticity ( ϕ ∘ ) angles get affected with the TPPs modes. The proposed study reports the transmittance, reflection, Faraday rotation and elliptical effect at the different voltage ( V ), magnetic field ( B ), thickness and incident angle of electromagnetic wave. The obtained results also show that TPPs modes tune with the variation of magnetic field and applied voltage. Hence, the optical properties and Faraday rotation of the considered structure exhibit tunable behavior with the variation of magnetic field, voltage and other material parameters. The investigated 1-DPS may be used in various tunable electro-optical or magneto-optical devices such as optical switch, memory device, isolators and modulators at optimum values of material parameters.