棱镜型SPR磁场传感器仿真分析
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摘要
提出了一种基于磁流体的棱镜型表面等离子共振传感器模型来实现磁场传感。在该结构中磁流体的折射率随外加磁场的变化而变化。利用传输矩阵法,数值模拟了表面等离子共振传感器的反射光谱,考察了不同波长下金属层和磁流体层的厚度对传感灵敏度的影响,给出了仿真结果,并结合实际分析了其传感特性。
A prism surface plasmon resonance sensor model based on magnetic fluid is proposed to realize magnetic field sensing. In this structure, the refractive index of the magnetic fluid varies with the external magnetic field. By using the transfer matrix method, the reflection spectrum of the surface plasmon resonance sensor is simulated numerically, the influence of the thickness of metal layer and magnetohydrodynamic layer on the sensing sensitivity is investigated, and the simulation results are given. According to practice, the sensing characteristics are analyzed.
A prism surface plasmon resonance sensor model based on magnetic fluid is proposed to realize magnetic field sensing. In this structure, the refractive index of the magnetic fluid varies with the external magnetic field. By using the transfer matrix method, the reflection spectrum of the surface plasmon resonance sensor is simulated numerically, the influence of the thickness of metal layer and magnetohydrodynamic layer on the sensing sensitivity is investigated, and the simulation results are given. According to practice, the sensing characteristics are analyzed.
引文
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[2]卜胜利,纪红柱.基于纳米磁流体材料的传感应用[J].科技导报,2015,33(6):107-114.
[3]徐雪影,施伟华.一维磁流体填充的光子晶体磁场和温度传感[J].光通信研究,2018(3):48-51.
[4]荆庆丽,杜春光,高健存.表面等离子共振现象的新应用———微弱磁场的测量[J].物理学报,2013,62(3):350-355.
[5]Alberto N,Domingues M F,Marques C,et al. Optical fiber magnetic field sensors based on magnetic fluid:a review[J]. sensors,2018,18(12):4325.
[6]Yu G J,Pu S L,Wang X,et al. Tunable one-dimensional photonic crystals based on magnetic fluids[J]. Optik,2013,124(17):2713-2715.
[7]Meng QQ, Zhao X, Lin C Y, et al. Figure of merit enhancement of a surface plasmon resonance sensor using a lowrefractive-index porous silica film[J]. Sensors,2017,17(8):1846.