Switchable digital metasurface based on phase change material in the terahertz region
Wei-Mang Pan, Jiu‐sheng Li, Chen Zhou
Abstract
We report a new approach for making a reconfigurable terahertz digital metasurface that is created with vanadium dioxide (VO 2 ) integrated metasurface unit cells. Such a metasurface achieves terahertz wave beam splitting and switching functionalities for the terahertz wave normal incidence by inducing VO 2 conductivity change under a different external temperature. The three-dimensional (3D) far-field scattering patterns and normalized electric field distribution obtained by using full-wave numerical simulations verify the behavior of the terahertz waves in each of the cases and illustrate our general theoretical predictions. This scheme provides a new effective method for the design of terahertz multifunctional devices.