Pu, M.Chen, PoWang, Y.Zhao, Z.Huang, C.Wang, C.Ma, X.Luo, X.2024-02-082024-02-082013-04-01https://wyoscholar.uwyo.edu/handle/internal/1647https://doi.org/10.15786/wyoscholar/9688Polarization states are of particular importance for the manipulation of electromagnetic waves. Here, we proposed the design and experimental demonstration of anisotropic meta-mirror for achromatic polarization tuning. It is demonstrated that linear polarized wave can be achromatically transformed to its cross-polarization state or to arbitrary circular polarization after its reflection from the mirror. Microwave experiments verified that the fraction bandwidth for 90 transformation efficiency can be larger than 3:1. Furthermore, by utilizing photoinduced carrier generation in silicon, a broadband tunable circular polarizer is demonstrated in the terahertz regime.enghttps://creativecommons.org/licenses/by/4.0/Carrier generationCircular polarizersCross polarizationsElectromagnetic polarizationExperimental demonstrationsMicrowave experimentsPolarization stateTransformation efficiencyjournal contribution10.1063/1.4799162