High Sensitivity SPR Refractive Index Sensor Based on D-shaped PCF with Ge-doped SiO2 Core

被引:0
作者
You, Qingcheng [1 ]
Zhou, Yi [1 ]
Zhu, Yukun [1 ]
Ji, Licui [1 ]
Li, Yichen [1 ]
Li, Bin [1 ]
Gao, Xu [1 ]
Wang, Xing [1 ]
Pan, Honggang [1 ]
机构
[1] Tianjin Univ Technol, Engn Res Ctr Optoelect Devices & Commun Technol, Sch Integrated Circuit Sci & Engn,Minist Educ, Tianjin Key Lab Film Elect & Commun Devices, Tianjin 300384, Peoples R China
关键词
Surface plasmon resonance; Photonic crystal fiber; Plasma; Refractive index; Sensor;
D O I
10.1007/s11468-025-03101-5
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
In this study, a D-shaped photonic crystal fiber (PCF) sensor with surface plasmon resonance (SPR) was designed with Ge-doped Si as the fiber core. The surface plasmon wave was excited by gold plating on the D-shaped surface. Numerical simulations by the finite element method (FEM) show that this sensor can realize a wide detection range of refractive index (RI) measurement from 1.330 to 1.445. The maximum wavelength sensitivity (WS) is 45,600 nm/RIU, and the maximum accuracy is 2.19 x 10-6 RIU. Compared with the sensor with a pure SiO2 fiber core, the maximum WS is increased by about 2.87 times, and the average WS is increased by 20.6%. The proposed sensor is characterized by a simple structure, high sensitivity, and a large detection range, which has great potential in cell activity monitoring, food additives, and residue detection.
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页数:10
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