Research progress on dynamic regulation of THz wave based on VO2 phase transition characteristics

Abstract

The terahertz(THz) wave is located in the transition region of photonics to electronics, and has important application prospects in high-speed broadband communication, radar, imaging and other fields. However, the devices currently used for dynamic regulation of THz waves are still lacking, which limits the development of THz technology to some extent. VO2 has an unique metal-insulator phase change characteristic, and the phase change process can be applied to dynamically regulate THz wave transmission. It is also a recent research hotspot to explore the combination of metamaterials and VO2 to prepare efficient, dynamic and flexible terahertz functional devices. In this paper, the phase transition characteristics of VO2 are briefly described, and the effects of microstructure and chemical composition on phase transition characteristics are analyzed. The research progress of VO2 film in THz band regulation performance is reviewed systematically, and the different combinations of VO2 and metamaterials are summarized. In the application of THz wave dynamic regulation, the development prospects and challenges of THz wave regulation function devices based on VO2 phase transition characteristics are prospected.

Keywords

• metamaterial
• terahertz
• vanadium dioxide
• modulator