Highly Sensitive Two-Parameter Anti-resonant Fiber (ARF) Sensor Based on Surface Plasmon Resonance in the Terahertz Band

IF 3.3 4区物理与天体物理 Q2 CHEMISTRY, PHYSICAL Plasmonics Pub Date : 2024-05-27 DOI:10.1007/s11468-024-02363-9

Jie He, Jianxin Wang, Xili Lu, Wei Liu, Jingwei Lv, Lin Yang, Qiang Liu, Paul K. Chu, Chao Liu

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Abstract

A two-parameter anti-resonant fiber (ARF) sensor based on the principle of surface plasmon resonance (SPR) is designed to detect refractive index (RI) and temperature simultaneously. Graphene is coated on the externally cut negative curvature tube as the plasmonic medium to excite terahertz SPR for detecting the RI of the external liquid. In addition, polydimethylsiloxane (PDMS) is filled in the graphene-coated tube to sense the temperature of the liquid. The properties of the ARF-SPR sensor are analyzed by the finite element method. The maximum wavelength sensitivity and amplitude sensitivity of 13,888.9 µm/RIU and 87.40 RIU⁻¹ respectively are observed at the second resonance peak for RIs between 1.3 and 1.36, and the minimum resolution is 7.2 × 10⁻⁹ RIU⁻¹. In the temperature range of 26.85 to 76.85 °C, the first resonance peak is insensitive to the temperature, and the maximum temperature sensitivity and amplitude sensitivity of the second resonance peak are 8.4 µm/°C and 0.058 °C⁻¹, respectively, with a resolution on the order of 10⁻⁵. This special design, boasting a simple structure, overcomes the limitations of single-parameter measurements and solves the problems of two-parameter cross-sensitivity while offering excellent sensing performance.

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基于太赫兹波段表面等离子体共振的高灵敏度双参数反共振光纤 (ARF) 传感器

基于表面等离子体共振（SPR）原理设计的双参数反谐振光纤（ARF）传感器可同时检测折射率（RI）和温度。在外部切割的负曲率管上涂覆石墨烯作为质子介质，激发太赫兹 SPR 以检测外部液体的折射率。此外，石墨烯涂层管中还填充了聚二甲基硅氧烷（PDMS），以感知液体的温度。通过有限元法分析了 ARF-SPR 传感器的特性。当 RI 在 1.3 和 1.36 之间时，在第二个共振峰处观察到的最大波长灵敏度和振幅灵敏度分别为 13,888.9 µm/RIU 和 87.40 RIU-1，最小分辨率为 7.2 × 10-9 RIU-1。在 26.85 至 76.85 °C 的温度范围内，第一个共振峰对温度不敏感，第二个共振峰的最大温度灵敏度和振幅灵敏度分别为 8.4 µm/°C 和 0.058 °C-1，分辨率为 10-5 量级。这种特殊的设计结构简单，克服了单参数测量的局限性，解决了双参数交叉灵敏度的问题，同时具有出色的传感性能。

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来源期刊

Plasmonics 工程技术-材料科学：综合

CiteScore

5.90

自引率

6.70%

发文量

164

审稿时长

2.1 months

期刊介绍： Plasmonics is an international forum for the publication of peer-reviewed leading-edge original articles that both advance and report our knowledge base and practice of the interactions of free-metal electrons, Plasmons. Topics covered include notable advances in the theory, Physics, and applications of surface plasmons in metals, to the rapidly emerging areas of nanotechnology, biophotonics, sensing, biochemistry and medicine. Topics, including the theory, synthesis and optical properties of noble metal nanostructures, patterned surfaces or materials, continuous or grated surfaces, devices, or wires for their multifarious applications are particularly welcome. Typical applications might include but are not limited to, surface enhanced spectroscopic properties, such as Raman scattering or fluorescence, as well developments in techniques such as surface plasmon resonance and near-field scanning optical microscopy.