High confidence plasmonic sensor based on photonic crystal fibers with a U-shaped detection channel

被引:78
|
作者
Zhu, Wanlai [1 ]
Yi, Yingting [2 ]
Yi, Zao [1 ]
Bian, Liang [1 ]
Yang, Hua [3 ]
Zhang, Jianguo [4 ]
Yu, Yang [5 ]
Liu, Chao [6 ]
Li, Gongfa [7 ]
Wu, Xianwen [8 ]
机构
[1] Southwest Univ Sci & Technol, Joint Lab Extreme Condit Matter Properties, Key Lab Mfg Proc TestingTechnol, State Key Lab Environm Friendly Energy Mat,Minist, Mianyang 621010, Peoples R China
[2] Cent South Univ, Coll Phys & Elect, Changsha 410083, Peoples R China
[3] Lanzhou Univ Technol, Sch Sci, Lanzhou 730050, Peoples R China
[4] Jinzhong Univ, Dept Phys, Jinzhong 030619, Peoples R China
[5] Natl Univ Def Technol, Coll Liberal Arts & Sci, Hunan Prov Key Lab Novel Nanooptoelect Informat Ma, Changsha 410073, Peoples R China
[6] Northeast Petr Univ, Sch Phys & Elect Engn, Daqing 163318, Peoples R China
[7] Jishou Univ, Sch Chem & Chem Engn, Jishou 416000, Peoples R China
[8] Wuhan Univ Sci & Technol, Hubei Key Lab Mech Transmiss & Mfg Engn, Wuhan 430081, Peoples R China
基金
中国国家自然科学基金;
关键词
OPTICAL-FIBER; PHOTOCATALYTIC PERFORMANCE; FLUORESCENT DETECTION; HIGH-SENSITIVITY; FACILE SYNTHESIS; QUANTUM DOTS; SURFACE; GRAPHENE; NANOCRYSTALS; METAL;
D O I
10.1039/d2cp04605a
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 order to improve the performance of optical fiber sensing and expand its application, a photonic crystal fiber (PCF) plasmonic sensor with a U-shaped channel based on surface plasmon resonance (SPR) is proposed. We have studied the general influence rules of structural parameters such as the radius of the air hole, the thickness of the gold film and the number of U-shaped channels using COMSOL based on the finite element method. The dispersion curves and loss spectrum of the surface plasmon polariton (SPP) mode and the Y-polarization (Y-pol) mode as well as the distribution of the electric field intensity (normE) under various conditions are studied using the coupled mode theory. The maximum refractive index (RI) sensitivity achieved in the RI range of 1.38-1.43 is 24.1 mu m RIU-1, which corresponds to a full width at half maximum (FWHM) of 10.0 nm, a figure of merit (FOM) of 2410 RIU-1 and a resolution of 4.15 x 10(-6) RIU. The results show that the proposed sensor combines the SPR effect, which is extremely sensitive to changes in the RI of the surrounding medium and realizes real-time detection of the external environment by analyzing the light signal modulated by the sensor. In addition, the detection range and sensitivity can be extended by adjusting the structural parameters. The proposed sensor has a simple structure with excellent sensing performance, which provides a new idea and implementation method for real-time detection, long-range measurement, complex environment monitoring and highly integrated sensing, and has a strong potential practical value.
引用
收藏
页码:8583 / 8591
页数:9
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