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<p>A surface plasmon resonance photonic crystal fiber sensor featuring a photonic crystal fiber-enhanced design with three layers of periodically arranged air holes has been designed to overcome restricted detection ranges, thanks to its flexible structure and enhanced performance. This unique structure expands the sensor's detection range and enhances its sensitivity and accuracy for substances with different refractive indices. Simulations using the finite element method show that the sensor maintains exceptional performance throughout the ultra-wide refractive index detection range of 1.18–1.38. It has an optimal resolution of 1.07 × 10<sup>–5</sup> RIU and a maximum wavelength sensitivity of 9350 nm/RIU. Our suggested sensor has remarkably comprehensive detection capabilities in the near-infrared spectrum due to its wide detection range and high sensitivity. These benefits point to possible future uses in the fields of environmental monitoring, biological sensing, and chemical analysis.</p>

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High-Sensitivity Broad-Range Refractive Index Sensor Using Gold-Coated Photonic Crystal Fiber for Surface Plasmon Resonance

  • 期刊论文

  • 发表日期：

    2025年8月15日

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  • Pibin Bing,
  • Yaowei Liu,
  • Mengxin Zhou,
  • Jun Lin,
  • Zhongyang Li,
  • Hongtao Zhang,
  • Zhiliang Chen,
  • Silei Wang,
  • Juan Xu

摘要

A surface plasmon resonance photonic crystal fiber sensor featuring a photonic crystal fiber-enhanced design with three layers of periodically arranged air holes has been designed to overcome restricted detection ranges, thanks to its flexible structure and enhanced performance. This unique structure expands the sensor's detection range and enhances its sensitivity and accuracy for substances with different refractive indices. Simulations using the finite element method show that the sensor maintains exceptional performance throughout the ultra-wide refractive index detection range of 1.18–1.38. It has an optimal resolution of 1.07 × 10–5 RIU and a maximum wavelength sensitivity of 9350 nm/RIU. Our suggested sensor has remarkably comprehensive detection capabilities in the near-infrared spectrum due to its wide detection range and high sensitivity. These benefits point to possible future uses in the fields of environmental monitoring, biological sensing, and chemical analysis.