Eccentric Core Optical Fiber SPR Sensor for Refractive Index Sensing Characteristics

被引:0
|
作者
Liu, Jianxia [1 ]
Li, Chang [1 ]
Yuan, Libo [2 ]
Li, Chenghao [1 ]
机构
[1] Hubei Univ Sci & Technol, Sch Elect & Informat Engn, Xianning 437100, Peoples R China
[2] Guilin Univ Elect Technol, Sch Optoelect Engn, Guangxi Key Lab Optoelect Informat Proc, Guilin 541004, Peoples R China
关键词
Eccentric core optical fiber; Surface plasmon resonance; Wavelength sensitivity; SURFACE; BIOSENSOR; DESIGN; SILVER;
D O I
10.1007/s11468-024-02508-w
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
This study proposes an eccentric core optical fiber biosensor based on the surface plasmon resonance phenomenon, utilizing COMSOL Multiphysics 6.2 finite element method (FEM). An Ag film with a thickness of 30nm is coated on the cladding of the eccentric core optical fiber. The analytical layers employed include air, water, blood plasma, and a self-set refractive index (RI) of 1.373. A 5-nm thick TiO2 layer is coated between the Ag film and the analyte. This TiO2 layer not only prevents the Ag layer from oxidation but also enhances the sensor's sensitivity. The sensor serves as a theoretical foundation for experimental research. The wavelength sensitivities have been calculated, with the self-set RI of 1.373 exhibiting the maximum sensitivity of 1785.714 nm/RIU and a resolution of 5.60 x 10-5 RIU. The proposed sensor presents itself as a promising candidate for a low-cost, simple-geometry biochemical sensing solution.
引用
收藏
页数:13
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