Tunable mid-infrared ultra-wideband absorption device with annular-square open metamaterials based on VO2 phase change

IF 3 Q2 PHYSICS, CONDENSED MATTER

Micro and Nanostructures Pub Date : 2025-09-15 DOI:10.1016/j.micrna.2025.208353

Jiao Wang , Mengsi Liu , Hua Yang , Zao Yi , Chaojun Tang , Fan Gao , Junqiao Wang , Boxun Li

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Abstract

We propose a thermally tunable, ultra-broadband mid-infrared metamaterial absorber based on vanadium dioxide (VO₂) with a simple annular-square patterned structure. The device, composed of a Ti substrate, a SiO₂ spacer, and a VO₂ functional layer, achieves an outstanding average absorption rate of 98.19 % and a broad bandwidth of 11.67 μm (7.44–19.11 μm) covering the atmospheric window (8–14 μm) when VO₂ is in its metallic phase (342 K). The absorption mechanism is elucidated through impedance matching and electromagnetic field analysis, revealing a combination of localized surface plasmon resonance and Fabry-Perot resonance. The absorber's performance is dynamically tunable with temperature via the VO₂ phase transition and exhibits remarkable insensitivity to incident angle and polarization. Its simple three-layer structure facilitates easier fabrication compared to complex alternatives. This work provides a promising strategy for applications in infrared stealth, thermal radiation, and photothermal conversion.

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基于VO2相变的环形方形开放超材料可调谐中红外超宽带吸收装置

我们提出了一种基于二氧化钒（VO2）的热可调谐超宽带中红外超材料吸收体，具有简单的环形方形图案结构。该器件由Ti衬底、SiO2间隔层和VO2功能层组成，在VO2处于金属相（342 K）时，平均吸收率为98.19%，带宽为11.67 μm (7.44-19.11 μm)，覆盖大气窗口（8-14 μm）。通过阻抗匹配和电磁场分析阐明了吸收机理，揭示了局域表面等离子体共振和法布里-珀罗共振的结合。吸收剂的性能可以通过VO2相变随温度动态调节，并且对入射角和极化不敏感。与复杂的替代品相比，其简单的三层结构更容易制造。这项工作为红外隐身、热辐射和光热转换等领域的应用提供了一种有前途的策略。

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来源期刊

Micro and Nanostructures

CiteScore

6.50

自引率

0.00%

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