A Simple and Tunable Reflective Polarization Converter Based on Vanadium Oxide Built-in Metamaterial Structure

In this paper a simple and tunable reflective polarization converter has been investigated numerically based on metamaterial which composes of a two-corner-cut square patch resonator embedded into Vanadium dioxide film (VO2) and reflective ground layer. All the results obtained by the CST Microwave Studio show that the polarization conversion ratio (PCR) above 90% is achieved from 1.46-2 THz at the temperature about 25 °C under the linearly polarized wave incidence normally. In addition, the influences on polarization conversion properties have been demonstrated with the insulator-to-metal phase transition of the Vanadium dioxide film (VO2) film by the method of varying the temperature. According to the results, the designed metamaterial could be applied in the area of temperature adjustable sensing, THz wireless communication, tunable polarized devices.