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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 (VO 2 ) in the THz band is proposed, which achieved dynamic control of asymmetric transmission by exploiting insulator-to-metal transition characteristics of VO 2 . When VO 2 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 VO 2 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.
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Cao et al. (2024) studied this question.
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