Surface plasmon resonance sensor based on U-shaped photonic quasi-crystal fiber

被引：33
|
作者：
Liu, Qiang [1 ]
Jiang, Yu [1 ]
Sun, Yudan [1 ,2 ]
Hu, Chunjie [3 ]
Sun, Jiudi [1 ]
Liu, Chao [1 ]
Lv, Jingwei [1 ]
Zhao, Jin [1 ]
Yi, Zao [4 ]
Chu, Paul K. [5 ,6 ]
机构：
[1] Northeast Petr Univ, Sch Phys & Elect Engn, Daqing 163318, Peoples R China
[2] Daqing Normal Univ, Coll Mech & Elect Engn, Daqing 163712, Peoples R China
[3] Harbin Med Univ, Dept Gynaecol & Obstet, Affiliated Hosp 4, Harbin 150001, Peoples R China
[4] Southwest Univ Sci & Technol, Joint Lab Extreme Condit Matter Properties, Mianyang 621010, Sichuan, Peoples R China
[5] City Univ Hong Kong, Kowloon, Dept Phys, Dept Mat Sci & Engn, Tat Chee Ave, Hong Kong, Peoples R China
[6] City Univ Hong Kong, Kowloon, Dept Biomed Engn, Tat Chee Ave, Hong Kong, Peoples R China
来源：
APPLIED OPTICS | 2021年 / 60卷 / 06期
关键词：
35;
D O I：
10.1364/AO.419518
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A high-sensitivity surface plasmon resonance (SPR) sensor is designed and analyzed numerically. The sensor is constructed on the eightfold U-shaped photonic quasi-crystal fiber (PQF) and coated with indium tin oxide (ITO). The coupling between the core mode and surface plasmon polariton mode is enhanced due to shortening of the distance between the core and the ITO layer, so that the PQF-SPR sensor exhibits high refractive index (RI) sensitivity in the near-infrared region. The maximum wavelength sensitivity and the corresponding resolution of this sensor are 42,000 nm/RIU and 2.38 x 10(-6) RIU, respectively. The average wavelength sensitivity is 12,750 nm/RIU in the refractive index range of 1.306-1.386. This advanced sensor is suitable for the determination of RIs in the near-infrared region. (C) 2021 Optical Society of America
引用
收藏
页码：1761 / 1766
页数：6
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