A numerical investigation study on tunable graphene-squared pixel array-based infrared polarizer

This paper proposes a tunable graphene-silica-assisted squared pixel array-shaped polarizer construction for the infrared frequency range. A silica and pixel graphene array layered structure was used to create the tunable polarizer. The polarizer behavior of the structure is studied over the 1-15 THz of infrared frequency. Single-layer graphene sheet Fermi energy/chemical potential is adjustable for the proposed structure. The transmittance coefficient and phase variation response are presented for the different pixel array modes of the designs. The overall behavior of the structure is evaluated in terms of the co- and cross-polarization effect. The behavior of the phase difference, polarization conversion rate, and wide-angle stability are presented for two of the overall pixel array structures. The proposed structure of the polarizer allows choosing the resonating conditions over 1-15 THz of the band using different pixel array geometries, transmittance and phase variation responses. Electro-optical structures in the lower THz band can benefit from the proposed results of this tunable polarizer structure.