Tunable wide- and narrow-band terahertz metamaterial absorber using vanadium dioxide

IF 2.8 3区物理与天体物理 Q2 PHYSICS, CONDENSED MATTER

Physica B-condensed Matter Pub Date : 2025-09-19 DOI:10.1016/j.physb.2025.417826

Huo Zhang , Shilong Zhou , Chuanpei Xu , Zhi Li , Yuee Wang , Xianhua Yin , Tao Chen

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Abstract

With the rapid development of terahertz metamaterial absorbers, tunable devices are critical for electromagnetic modulation. This study proposes a phase-transition-driven metamaterial absorber with switchable bandwidth, utilizing vanadium dioxide (VO₂)'s metal-insulator transition (MIT). Its tri-layer structure includes a gold (Au) bottom plane, polytetrafluoroethylene (PTFE) spacer, and VO₂-gold (Au) resonator array. Simulations show two modes: metallic VO₂ enables ultra-broadband absorption (2.97–7.12 THz, >90 %); insulating VO₂ exhibits narrowband resonance at 9.43 THz (>99 % absorbance) with quality factor 204.1 and sensitivity 1018 GHz/RIU. It operates polarization-insensitively with >90 % absorption at 50° incidence. This dual-functional design breaks traditional stealth material limitations via adjustable bandwidth, integrates stealth and sensing, and offers new possibilities for adaptive terahertz systems in military camouflage, environmental monitoring, and biomedical fields.

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使用二氧化钒的可调谐宽窄带太赫兹超材料吸收器

随着太赫兹超材料吸收器的快速发展，可调谐器件成为实现电磁调制的关键。本研究利用二氧化钒（VO2）的金属-绝缘体转变（MIT），提出了一种具有可切换带宽的相变驱动的超材料吸收体。其三层结构包括金（Au）底平面、聚四氟乙烯（PTFE）间隔层和vo2金（Au）谐振器阵列。模拟显示了两种模式：金属VO2实现了超宽带吸收（2.97-7.12 THz, > 90%）；绝缘VO2在9.43 THz （>； 99%吸光度）处表现出窄带共振，质量因子为204.1，灵敏度为1018 GHz/RIU。在50°入射下，它的吸收率为90%，对偏振不敏感。这种双功能设计通过可调带宽打破了传统隐身材料的限制，集成了隐身和传感，并为军事伪装、环境监测和生物医学领域的自适应太赫兹系统提供了新的可能性。

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来源期刊

Physica B-condensed Matter 物理-物理：凝聚态物理

CiteScore

4.90

自引率

7.10%

发文量

703

审稿时长

44 days

期刊介绍： Physica B: Condensed Matter comprises all condensed matter and material physics that involve theoretical, computational and experimental work. Papers should contain further developments and a proper discussion on the physics of experimental or theoretical results in one of the following areas: -Magnetism -Materials physics -Nanostructures and nanomaterials -Optics and optical materials -Quantum materials -Semiconductors -Strongly correlated systems -Superconductivity -Surfaces and interfaces