Abstract
A surface plasmon resonance (SPR) sensor composed of photonic crystal fibers (PCFs) is designed for refractive index (RI) sensing with a high figure of merit (FOM). The dual Au-MgF2 layer is covered on the double-side polished D-type PCF to stimulate SPR. Our numerical analysis reveals that the maximum wavelength sensitivity and amplitude sensitivity of the PCF-SPR sensor are 59,000 nm/RIU and 6076 RIU−1, respectively, in the RI range of 1.25 ~ 1.43. The maximum FOM is 2033 RIU−1 and the resolution is 1.69 × 10−6. The results provide guidance and insights into the design of PCF-SPR sensors with high FOM.
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Due to personal privacy and intellectual property protection, the datasets generated and analyzed during the current study are not publicly available but are available from the corresponding author on reasonable request.
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Funding
This work was jointly supported by the Instructional Technology Plan of Daqing City (Grant no. zd-2023-19), Daqing Normal University Talent Project (Project no. 22RC006), Basic Research Support Project for the Excellent Youth Scholars of Heilongjiang Province, Heilongjiang Provincial Natural Science Foundation of China (Grant no. JQ2023F001), Local Universities Reformation and Development Personnel Training Supporting Project from Central Authorities, Natural Science Foundation of Heilongjiang Province (Grant no. LH2021F007), China Postdoctoral Science Foundation funded project (Project no. 2020M670881), City University of Hong Kong Strategic Research Grant (SRG) (Grant no. 7005505), and City University of Hong Kong Donation Research Grant (Grant no. DON-RMG 9229021).
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Conceptualization: YS, SWa. Methodology: YS, QL. Formal analysis and investigation: SWa, SWe, XZ. Writing-original draft preparation: SWa. Writing-review and editing: PKC. Funding acquisition: CL. Resources: TL, JL. Validation: WL.
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Sun, Y., Wang, S., Liu, Q. et al. Au-MgF2-Coated Photonic Crystal Fiber Surface Plasmon Resonance Sensor with High FOM. Plasmonics (2024). https://doi.org/10.1007/s11468-024-02228-1
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DOI: https://doi.org/10.1007/s11468-024-02228-1