Switchable terahertz metasurface with polarization conversion and filtering functions.

A switchable metasurface with dual functions of polarization conversion and filtering is proposed in this paper. The designed structure is composed of a medium-metal-medium-metal-medium structure, and is embedded in the metal metasurface. When is an insulated state, this structure can perform linear polarization conversion under terahertz wave normal incidence, and it has good asymmetric transmission capabilities.

BiOSe for broadband terahertz wave switching.

Many modern terahertz systems require dynamic manipulation of a terahertz wave. We proposed a terahertz wave switch based on a / structure. The transmittance and conductivity characteristics of the in a terahertz region have been measured by terahertz time-domain spectroscopy and analyzed using the Drude model.