Journal
PLASMONICS
Volume 16, Issue 6, Pages 2291-2303Publisher
SPRINGER
DOI: 10.1007/s11468-021-01483-w
Keywords
Surface plasmon resonance; Micro-fiber; Graphene/Ag/TiO2; Sensor
Funding
- 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]
- Open Foundation of State Key Laboratory of Bioelectronics, Southeast University
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A highly sensitive surface plasmon resonance sensor based on a miniature tapered single-mode fiber was proposed in this paper, with graphene, silver, and titanium dioxide layers to enhance sensor performance. Simulation results showed that high-performance SPR can be achieved with 15 layers of graphene, a 40 nm silver layer, and a 20 nm titanium dioxide layer.
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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