Affiliation:
1. Beijing University of Technology
2. Qilu University of Technology (Shandong Academy of Sciences)
Abstract
The asymmetric transmission of terahertz (THz) waves has attracted considerable interest because of its novel applications in isolators and wireless communication. An A-shaped switchable asymmetric transmission metasurface integrating vanadium dioxide (VO2) in the THz band is proposed, which achieved dynamic control of asymmetric transmission by exploiting insulator-to-metal transition characteristics of VO2. When VO2 is in an insulating state, the proposed metadevice realized an asymmetric transmission effect of the asymmetric transmission parameter reaching up to 0.76 and realized linear polarization conversion with a 95% polarization conversion rate. Furthermore, the proposed metadevice prevented asymmetric transmission and polarization conversion as VO2 transforms in the metallic state. This work provides a new ideal for the design of switchable asymmetric transmission metadevices and has potential applications in wireless communication, sensing, and polarization control.
Funder
National Natural Science Foundation of China
Natural Science Foundation of Shandong Province
Youth Innovation Team Plan of Shandong Colleges and Universities
Shandong Province Science and Technology Small and Medium-sized Enterprises Innovation Ability Improvement Project
Talent Research Project of Qilu University of Technology
Peiyou Fund of Qilu University of Technology