Highly sensitive and stable probe refractometer based on configurable plasmonic resonance with nano-modified fiber core

作     者：Jianying Jing Kun Liu Junfeng Jiang Tianhua Xu Shuang Wang Tiegen Liu Jianying Jing;Kun Liu;Junfeng Jiang;Tianhua Xu;Shuang Wang;Tiegen Liu

作者机构：School of Precision Instruments and Opto-Electronics EngineeringTianjin UniversityTianjin 300072China Key Laboratory of Opto-Electronics Information TechnologyMinistry of EducationTianjin UniversityTianjin 300072China Tianjin Optical Fiber Sensing Engineering CenterInstitute of Optical Fiber SensingTianjin UniversityTianjin 300072China 

出 版 物：《Opto-Electronic Advances》 (光电进展（英文）)

年 卷 期：2023年第6卷第6期

页      面：38-51页

核心收录：

学科分类：07[理学] 080202[工学-机械电子工程] 08[工学] 070204[理学-等离子体物理] 0802[工学-机械工程] 0702[理学-物理学] 

基　　金：financial supports from in part by National Natural Science Foundation of China under Grants 61922061, 61775161 and 61735011 in part by the Tianjin Science Fund for Distinguished Young Scholars under Grant 19JCJQJC61400 

主　　题：fiber photonics sensor customized plasmonic resonance curve nano-modified fiber core tip hot spot effect high sensitivity and stability 

摘      要：A dispersion model is developed to provide a generic tool for configuring plasmonic resonance spectral *** customized design of the resonance curve aiming at specific detection requirements can be *** to the model,a probe-type nano-modified fiber optic configurable plasmonic resonance(NMF-CPR)sensor with tip hot spot enhancement is demonstrated for the measurement of the refractive index in the range of 1.3332-1.3432 corresponding to the low-concentration biomarker *** new-type sensing structure avoids excessive broadening and redshift of the resonance dip,which provides more possibilities for the surface modification of other functional *** tip hot spots in nanogaps between the Au layer and Au nanostars(AuNSs),the tip electric field enhancement of AuNSs,and the high carrier mobility of the WSe_(2)layer synergistically and significantly enhance the sensitivity of the ***-perimental results show that the sensitivity and the figure of merit of the tip hot spot enhanced fiber NMF-CPR sensor can achieve up to 2995.70 nm/RIU and 25.04 RIU^(−1),respectively,which are 1.68 times and 1.29 times higher than those of the conventional fiber plasmonic resonance *** results achieve good agreements with numerical simulations,demonstrate a better level compared to similar reported studies,and verify the correctness of the dispersion *** detection resolution of the sensor reaches up to 2.00×10^(−5)RIU,which is obviously higher than that of the conventional side-polished fiber plasmonic resonance *** indicates a high detection accuracy of the *** dense Au layer effectively prevents the intermediate nanomaterials from shedding and chemical degradation,which enables the sensor with high ***,the terminal reflective sensing structure can be used as a practical probe and can allow a more convenient operation.