Abstract
We propose and simulate a surface plasmon resonance (SPR) refractive index (RI) sensor based on a novel D-shaped photonic crystal fiber. We used an open air hole coated with gold film to improve SPR effect. The sensor uses photonic crystal fiber with the same air holes diameter. The effects of structural parameters on resonance spectrum were analyzed by finite element method (FEM). Three SPR peaks were obtained in the wavelength range of 800–1300 nm. The maximum sensitivity is 5626.86 nm/RIU and the maximum resolution is 1.78 × 10−5 RIU at the refractive index of 1.38. The simulation results show that the refractive index detection range of the sensor is 1.26–1.38. Compared with other D-shaped structures, our sensor can measure larger RI ranges of the analyte.
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This work was supported by key project of Tianjin Natural Science Foundation (No. 20JCZDJC00500) and Tianjin Postgraduate Research and Innovation (No. 2020YJSS009).
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Pan, H., Pan, F., Zhanga, A. et al. Wide refractive index detection range surface plasmon resonance sensor based on D-shaped photonic crystal fiber. Opt Quant Electron 54, 393 (2022). https://doi.org/10.1007/s11082-022-03805-6
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DOI: https://doi.org/10.1007/s11082-022-03805-6