Plasmonic Enhancement by TiO₂–Au–graphene Nanostructure in PCF-SPR Magnetic Field Sensor

IF 5.6 4区物理与天体物理 Q2 CHEMISTRY, PHYSICAL

Plasmonics Pub Date : 2026-08-15 DOI:10.1007/s11468-026-03430-z

Jingyi Tian, Zhenhua Du, Xiaoliang Dong, Rengang Geng, Jia Zhao

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引用次数: 0

Abstract

Magnetic field is intimately linked to human life and modern technology across diverse areas, including biomedical, industrial power system monitoring, geoscience exploration, and so on. Consequently, the development of high-sensitivity magnetic field sensors has become a research priority. First, a magnetic field photonic crystal fiber sensor based on the surface plasmon resonance effect is proposed, encompassing three-layer air holes and an elliptical open ring. The linear proportional method employed in the sensor structural design can facilitate independent adjustment of the phase-matched wavelength and reduce manufacturing complexity. Based on the physical mechanisms, a material composition including TiO₂, Au, and graphene is employed as the plasmonic material. Subsequently, to achieve optimal performance, the influence of each structural parameter on the sensing performance is analyzed individually by utilizing the finite element method. The results show that the proposed sensor can detect the magnetic field from 40Oe to 170Oe, with a maximum sensitivity of 13 nm/Oe and an average sensitivity of 1.85 nm/Oe. Finally, comparison of different material combinations verifies the feasibility of the material configuration of the proposed sensor from the standpoint of the numerical data. Such a process of structural design, optimization, and material comparison paves the way for the future proposal of high-sensitivity magnetic sensors.

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tio2 - au -石墨烯纳米结构在PCF-SPR磁场传感器中的等离子体增强

磁场与人类生活和现代科技密切相关，涉及生物医学、工业电力系统监测、地球科学勘探等多个领域。因此，开发高灵敏度磁场传感器已成为研究的重点。首先，提出了一种基于表面等离子体共振效应的磁场光子晶体光纤传感器，该传感器由三层空气孔和椭圆开环组成。采用线性比例法进行传感器结构设计，有利于相位匹配波长的独立调节，降低了制造复杂度。基于物理机制，采用TiO2、Au和石墨烯组成的材料作为等离子体材料。随后，为了实现最优性能，利用有限元法分别分析了各结构参数对传感性能的影响。结果表明，该传感器可以检测40Oe ~ 170Oe的磁场，最大灵敏度为13 nm/Oe，平均灵敏度为1.85 nm/Oe。最后，通过对不同材料组合的比较，从数值数据的角度验证了所提出传感器材料配置的可行性。这种结构设计、优化和材料比较的过程为未来提出高灵敏度磁传感器铺平了道路。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.