Bianisotropic origami metasurfaces for mechanically controlled asymmetric radiation

Abstract

Bianisotropic metasurfaces have been attracting increasing attention due to their strong capability for magneto–electric coupling manipulation on electromagnetic fields. Bianisotropic effect is physically determined by the symmetries of structure and switching among various bianisotropic states is thus difficult by varying material properties. Here, we propose a reconfigurable bianisotropic metasurface by arranging meta-atoms in a Miura-ori lattice. The bianisotropic properties are dynamically controlled via the deformation of the Miura-ori pattern, i.e., zero bianisotropy at the unfolded state and enhanced bianisotropy in folded geometries. It is also demonstrated that asymmetric radiation performance can be flexibly controlled by changing only the folded angle of deformation. Our work provides an alternative pathway toward dynamically control over the bianisotropy of metasurfaces, which may provide potential applications for smart directional radiation and scattering.

Keywords

• metasurface
• bianisotropy
• origami
• reconfigurable
• asymmetric radiation