Anisotropic Time-varying Metasurface for Real-time Polarization Conversion

Manipulating the polarization of electromagnetic waves is important for modern science and technology. Here, we propose an anisotropic time-varying metasurface for realizing dynamic conversion between input and output waves with different polarizations. The metasurface’s anisotropy can be dynamically tuned at will just by controlling the time-varying reflection phases of the metasurface for two orthogonally-polarized linear waves. A series of examples have been designed to verify polarization conversion among circular, linear, and even elliptical polarizations. The proposed method may provide a new way for versatile polarization manipulations that may have potential uses in many applications.