Refractive index sensor based on high-order surface plasmon resonance in gold nanofilm coated photonic crystal fiber

作     者：Zhen-Kai Fan Shao-Bo Fang Shu-Guang Li Zhi-Yi Wei 范振凯;方少波;李曙光;魏志义

作者机构：School of Information Science and EngineeringHebei University of Science and TechnologyShijiazhuang 050018China State Key Laboratory of Metastable Materials Science and Technologyand Key Laboratory of Microstructural Material Physics of Hebei ProvinceSchool of ScienceYanshan UniversityQinhuangdao 066004China Institute of PhysicsChinese Academy of SciencesBeijing 100190China University of Chinese Academy of SciencesBeijing 100049China 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2019年第28卷第9期

页      面：212-219页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

基　　金：Project supported by the National Key Research and Development Program of China(Grant No.2017YFC0110301) the National Natural Science Foundation of China(Grant Nos.61575219,91850209,and 11434016) the College Young Talents Program of Hebei Province,China(Grant No.BJ2018040) the Hebei University of Science and Technology Talent Introduction Project,China(Grant No.1181324) the Youth Innovation Promotion Association,Chinese Academy of Sciences(Grant No.2018007) 

主　　题：surface plasmon resonance photonic crystal fiber sensor 

摘      要：We propose a novel kind of wide-range refractive index optical sensor based on photonic crystal fiber(PCF) covered with nano-ring gold *** refractive index sensing performance of the PCF sensor is analyzed and simulated by the finite element method(FEM).The refractive index liquid is infiltrated into the cladding air hole of the *** comparing the sensing performance of two kinds of photonic crystal fiber structures, a wide range and high sensitivity structure is *** surface plasmon resonance(SPR) excitation material is chose as gold, and large gold nanorings are embedded around the first cladding air hole of the *** higher order surface plasmon modes are generated in this designed optical fiber *** resonance coupling between the fundamental mode and the 5 th order surface plasmon polariton(SPP)modes is excited when the phase matching condition is ***, the 3 rd loss peaks appear obvious red-shift with the increase of the analyte refractive index, which shows a remarkable polynomial fitting *** fitnesses of two structures are 0.99 and 0.98, *** the range of refractive indices is from 1.40 to 1.43, the two kinds of sensors have high linear sensitivities of 1604 nm/RIU and 3978 nm/RIU, respectively.