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<p>We propose a surface plasmon resonance sensor based on a modified photonic crystal fiber incorporating Au-ZrO<sub>2</sub> nanostructures to enhance plasmon resonance intensity, which enables minimal crosstalk in simultaneous detection of refractive index, magnetic field strength, and temperature. Three resonance wavelength modulation mechanisms are implemented: orthogonal polarization modes, metallic configurations, and tunable solution ratios. An Au-coated microchannel is infused with ethanol-chloroform solution for thermal sensing, while at the diametrically opposed position, an Ag-coated microchannel incorporates magnetic fluid to enable magnetic field sensing. Simulation results demonstrate maximum sensitivities of 6 μm/RIU within a refractive index range of 1.24–1.38, − 2 nm/°C over a temperature sensing range of − 50 to 200 °C, and 160 pm/Oe within a magnetic field range of 0–2000 Oe. The synergistic tri-parameter design strikes a balance between the parameter quantity, sensitivity optimization, and system complexity, indicating the potential to provide possible solutions for industrial process monitoring, geological environment detection, and emerging frontier applications.</p>

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Au-ZrO2 Nanostructure-Enhanced Photonic Crystal Fiber-Based Surface Plasmon Resonance for Triple Parameter Synchronous Sensing

  • 期刊论文

  • 发表日期：

    2025年6月27日

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  • Yuhan Wang,
  • Yi Zhang,
  • Zhixu Ye,
  • Jingyi Hao,
  • Xianbing Ming

摘要

We propose a surface plasmon resonance sensor based on a modified photonic crystal fiber incorporating Au-ZrO2 nanostructures to enhance plasmon resonance intensity, which enables minimal crosstalk in simultaneous detection of refractive index, magnetic field strength, and temperature. Three resonance wavelength modulation mechanisms are implemented: orthogonal polarization modes, metallic configurations, and tunable solution ratios. An Au-coated microchannel is infused with ethanol-chloroform solution for thermal sensing, while at the diametrically opposed position, an Ag-coated microchannel incorporates magnetic fluid to enable magnetic field sensing. Simulation results demonstrate maximum sensitivities of 6 μm/RIU within a refractive index range of 1.24–1.38, − 2 nm/°C over a temperature sensing range of − 50 to 200 °C, and 160 pm/Oe within a magnetic field range of 0–2000 Oe. The synergistic tri-parameter design strikes a balance between the parameter quantity, sensitivity optimization, and system complexity, indicating the potential to provide possible solutions for industrial process monitoring, geological environment detection, and emerging frontier applications.