Theoretical method for the analysis and design of tunable terahertz graphene-based Faraday polarization rotators.

A theoretical method is presented that facilitates the analysis and design of graphene-based tunable terahertz polarization rotators. Most previous designs are based on a three-dimensional (3-D) full-wave electromagnetic simulation; thus, it is time-consuming to get well-tuned structural parameters. Using the proposed method, the transmission response of the polarization rotator is directly calculated for a given set of structural parameters.

Equivalent circuit model for a graphene-based high efficiency tunable broadband terahertz polarizer.

An equivalent circuit model for a graphene-based high-efficiency tunable broadband THz polarizer is presented. The conditions for linear-to-circular polarization conversion in the transmission mode are utilized to derive a set of closed-form design formulas. Given a set of target specifications, the key structural parameters of the polarizer are directly calculated using this model.

Equivalent circuit model for the analysis and design of graphene-based tunable terahertz polarizing metasurfaces.

In this work, we present an equivalent circuit model that facilitates the analysis and design of graphene-based transmission- and reflection-mode tunable terahertz polarizers. The conditions for polarization conversion are analytically derived, and a set of closed-form design formulas is presented. Given the target specifications, the key structural parameters are directly calculated.