Abstract
A surface plasmon resonance (SPR) sensor based on dual-layered air hole shaped photonic crystal fiber (PCF) is proposed to realize the simultaneous measurement of refractive index (RI). The plasma materials silver (Ag) and titanium dioxide (TiO2) were sequentially coated on the outer surface of PCF to obtain enhanced sensing properties. By carefully adjusting the geometrical parameters, the simulation results show a maximum wavelength sensitivity of 72,000 nm/RIU for analyte refractive indices ranging from 1.26 to 1.365, which realizes the high-sensitivity sensing in the visible to near-infrared optical band. Moreover, the sensor attains a maximum figure of merit (FOM) of 229 and RI resolution of 1.29 × 10− 6. This work shows great potential for real-time, affordable, and accurate measurement in biomedical, biological and organic chemical domains.
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Funding
This work was supported by the National Basic Research Program of China. (973 Program) (Grant Number: 2010CB327801), the National Natural Science Foundation of China (Grant Number: 10874128). (Corresponding author: Ying LU) and the Natural Science Foundation of Tianjin (Grant No. 18JCQNJC71200).
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Yang, H., Wang, G., Lu, Y. et al. Highly sensitive refractive index sensor based on SPR with silver and titanium dioxide coating. Opt Quant Electron 53, 341 (2021). https://doi.org/10.1007/s11082-021-02981-1
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DOI: https://doi.org/10.1007/s11082-021-02981-1