Research on VO2-based absorbing/polarization conversion terahertz devices

Abstract

This study focuses on the development of terahertz devices based on vanadium dioxide (VO₂) that can perform both absorption and polarization conversion. VO₂ thin films have been extensively studied due to their insulator-metal transition properties, which allow VO₂ to undergo a reversible phase change from an insulating state to a metallic state under the influence of light, heat, or stress, accompanied by a sudden change in physical properties. The technical realization of this study involves providing a dual-functional metasurface device based on VO₂ that can switch between a line-to-line polarization converter and an absorber by changing temperature. This design not only overcomes the shortcomings of existing technologies but also offers new possibilities for the development of terahertz communication devices, especially in the context of the development of communication technology, making this research scientifically significant and promising for practical applications. Future work will focus on further optimizing device performance, reducing costs, and enabling large-scale production to meet the growing demands of terahertz communication technology.