Switchable absorbing, reflecting, and transmitting metasurface by employing vanadium dioxide on the same frequency

Abstract

In this work, we proposed a switchable metasurface based on phase transmission material of vanadium dioxide (VO 2 ) with metal and insulation mode. Simulation results demonstrated that the metasurface can switch perfectly at frequencies of 1.89 THz and 2.67 THz from two perfect absorbing peaks to a reflecting peak and a transmitting peak. When VO 2 serves as metal mode, there were two absorption peaks of 99.93% and 99.92% respectively. When VO 2 serves as insulation mode, the reflection and transmission magnitudes were 92.50% and 90.50% respectively. Simultaneously, the structure was insensitive to the incident angle from the simulation result. The proposed metasurface could therefore provide potential application prospects for the terahertz band switcher or sensor. • The proposed metasurface can switch at two frequency bands from the perfect absorber to transmitter and reflector. • The structure of a gold ring with a crack can generate a wide transmission frequency band. • The proposed metasurface can quickly respond and switch between two modes. • The proposed metasurface has insensitivity of incidence angle and cross-polarization.