Highly Sensitive Dual-core Photonic Crystal Fiber Based on a Surface Plasmon Resonance Sensor with Gold Film

被引：12
作者：
Zhu, Meijun [1 ]
Yang, Lin [1 ]
Lv, Jingwei [1 ]
Liu, Chao [1 ]
Li, Qiao [1 ]
Peng, Chao [1 ]
Li, Xianli [1 ]
Chu, Paul K. [2 ,3 ]
机构：
[1] Northeast Petr Univ, Sch Phys & Elect Engn, Daqing 163318, Peoples R China
[2] City Univ Hong Kong, Dept Phys, Dept Mat Sci & Engn, Kowloon, Tat Chee Ave, Hong Kong, Peoples R China
[3] City Univ Hong Kong, Dept Biomed Engn, Kowloon, Tat Chee Ave, Hong Kong, Peoples R China
来源：
PLASMONICS | 2022年 / 17卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Surface plasmon resonance; Photonic crystal fiber; Finite element method; Refractive index; Gold film; REFRACTIVE-INDEX SENSOR; SPR SENSOR; BIOSENSOR; DESIGN;
D O I：
10.1007/s11468-021-01543-1
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：
A highly sensitive surface plasmon resonance (SPR) sensor comprising a dual-core photonic crystal fiber (PCF) is designed to detect minute changes in analyte refractive indices (RIs) between 1.33 and 1.42. In order to simplify the fabrication process and analytical protocol, a gold film is deposited on the external surface of the fiber to excite surface plasmon polaritons (SPPs). The larger diameter air holes are used in the photonic crystal fiber (PCF) cladding, which not only simplifies the actual production, but also makes the energy of the core more concentrated, and can more fully generate surface plasmon resonance with surface plasmon polaritons (SPPs). The dual-core PCF-SPR sensor is analyzed by the finite-element method (FEM), and the various structural parameters are investigated systematically and optimized. The optimized PCF-SPR sensor shows a maximum wavelength sensitivity of 29,500 nm/RIU and resolution of 3.39 x 10(-6) RIU.
引用
收藏
页码：543 / 550
页数：8
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