Metamaterial-inspired ultra-broadband and switchable terahertz absorber and polarization converter based on vanadium dioxide
Метаматериалоподобный сверхширокополосный перестраиваемый терагерцевый поглотитель и преобразователь поляризации на основе диоксида ванадия
2025-07-31
SCID: 54.1/bwj5mbvq
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polarization conversionswitchable dual-mode operationterahertz metamaterialultra-broadband absorbervanadium dioxide
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Abstract (AI)
Abstract 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.
Key Findings
1
A vanadium-dioxide-based terahertz metamaterial provides two switchable operational modes controlled by VO2 phase.
2
In the insulating VO2 phase, the structure enables cross-polarization conversion exceeding 90% PCR across 1.16–2.81 THz, with an 83.1% relative bandwidth.
3
In the metallic VO2 phase, the structure achieves over 90% absorptivity from 1.98–5.98 THz, with a 100.5% relative bandwidth.
4
The design maintains stability over a wide range of incident angles and may support terahertz detection and communication.
Research Object
VO2-based terahertz metamaterial structure
Research Subject
Switchable ultra-broadband terahertz absorption and cross-polarization conversion across VO2 metallic and insulating phases, including incident-angle stability
Publication Details
Publication Date
2025-07-31
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