Broadband cross polarization converter with unity efficiency for terahertz waves based on anisotropic dielectric meta-reflectarrays

Abstract We show that the linear polarization state of electromagnetic waves at terahertz frequencies can be perfectly rotated to its orthogonal direction by an alternative design of anisotropic dielectric meta-reflectarrays. Numerical results demonstrate that the reflection coefficient converting to cross polarization after reflection can be as high as ~100% from 0.75 THz to 1.0 THz. The designed system does suffer little energy loss due to the absence of the metallic metamaterial unit cells and the absorptive dielectric.