Polarization Conversion Abnormal Reflection by All-dielectric Phase Gradient Metasurface Based on High-permittivity Ceramic

In this paper, we proposed and realized polarization conversion abnormal reflection in microwave regime at certain frequency through all-dielectric phase gradient metasurface (PGM) based on high-permittivity ceramics. An abnormal reflection of a phase gradient metasurface is designed using an array of sub-wavelength structures which are made of three quarters cylinders with different sizes. A cross-polarized reflection is observed simultaneously. According to the generalized reflection law, simulated results agree well with the theoretical predictions. The proposed method provides another way to design phase gradient metasurface via high-permittivity ceramics, which may broaden the way of using in practical applications.