Abstract
In this paper, a highly sensitive surface plasmon resonance sensor is proposed on the basis of a miniature tapered single-mode fiber. The sensing area of the tapered fiber is coated with graphene, silver, and titanium dioxide layer. The graphene layer is used to increase the light absorption rate, and the titanium dioxide layer is used to protect the silver layer from oxidation and improve the sensor sensitivity due to its high dielectric constant. According to the simulation results of COMSOL Multiphysics software, when the graphene is 15 layers, the silver layer is 40 nm, and the titanium dioxide is 20 nm, high-performance SPR can be obtained. The refractive index detection range of this sensor is 1.32–1.38, and its sensitivity can reach 8750 nm/RIU when the external refractive index is 1.38. The research results have potential application value for the design of high-performance SPR sensors.
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Data Availability
All data that support the findings of this study are available from the corresponding author upon reasonable request.
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Funding
This work was supported by the Natural Science Research Projects of Jiangsu Province University (20KJA510001), China Postdoctoral Science Foundation (2018T110480), Open Foundation of State Key Laboratory of Luminescent Materials and Devices (2020-skllmd-03), Research Center of Optical Communications Engineering & Technology, Jiangsu Province (ZXF201904), and Open Foundation of State Key Laboratory of Bioelectronics, Southeast University.
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Dan Wang and Wei Li conceived the idea. Chen Zhu and Jie Xu developed the theory. Qinrong Zhang and Jinze Li performed the simulation. Dan Wang, Benquan Liang, and Zhenkai Peng analyzed the data and wrote the manuscript.
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Wang, D., Li, W., Zhang, Q. et al. High-Performance Tapered Fiber Surface Plasmon Resonance Sensor Based on the Graphene/Ag/TiO2 Layer. Plasmonics 16, 2291–2303 (2021). https://doi.org/10.1007/s11468-021-01483-w
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DOI: https://doi.org/10.1007/s11468-021-01483-w