Polarization 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. © 2013 American Institute of Physics.
Applied Physics Letters
Pu, M.; Chen, Po; Wang, Y.; Zhao, Z.; Huang, C.; Wang, C.; Ma, X.; and Luo, X. (2013). "Anisotropic Meta-Mirror for Achromatic Electromagnetic Polarization Manipulation." Applied Physics Letters 102.13, 131906-1-131906-4.