Proposed metamaterial demonstrates over 90% absorptivity and polarization conversion in terahertz frequencies, suggesting potential for communication applications.
We propose a vanadium dioxide (VO₂)-based terahertz metamaterial with dual operational modes. In the metallic phase of VO2, the structure achieves over 90% absorptivity across 1.98–5.98 THz (relative bandwidth: 100.5%). Switching VO₂ to the insulating phase enables cross-polarization conversion with >90% polarization conversion ratio (PCR) in 1.16–2.81 THz (relative bandwidth: 83.1%). The proposed design, which supports wide incident angle stability, shows potential in terahertz detection and communication.
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Wei et al. (2025) studied this question.
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