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<p>This study designed a symmetric double-D–shaped slot photonic crystal fiber (PCF) temperature sensor based on surface plasmon resonance (SPR). Gold was chosen as the plasma material to support the surface plasmon wave. Polydimethylsiloxane (PDMS) was coated around the PCF and in the groove to sense the temperature change. Finite element method (FEM) numerical simulations show that this PCF-SPR temperature sensor can realize a wide temperature detection range of − 25 to 130&#xa0;°C. The maximum wavelength sensitivity (WS) is 30.2&#xa0;nm/°C, the maximum figure of merit (FOM) is 0.1306&#xa0;°C<sup>−1</sup>, and the maximum accuracy is 3.31 × 10<sup>−3</sup>&#xa0;°C. Therefore, the proposed sensor is highly competitive in industrial automation, automotive electronics, and temperature measurement in medical devices such as cardiac monitors.</p>

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Symmetric Double-D–Shaped Photonic Crystal Fiber Temperature Sensor Based on Surface Plasmon Resonance

  • 期刊论文

  • 发表日期：

    2025年5月23日

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  • Qingcheng You,
  • Yu Zhang,
  • Honggang Pan,
  • Zihong Zhao,
  • Yukun Zhu,
  • Yichen Li,
  • Bin Li

摘要

This study designed a symmetric double-D–shaped slot photonic crystal fiber (PCF) temperature sensor based on surface plasmon resonance (SPR). Gold was chosen as the plasma material to support the surface plasmon wave. Polydimethylsiloxane (PDMS) was coated around the PCF and in the groove to sense the temperature change. Finite element method (FEM) numerical simulations show that this PCF-SPR temperature sensor can realize a wide temperature detection range of − 25 to 130 °C. The maximum wavelength sensitivity (WS) is 30.2 nm/°C, the maximum figure of merit (FOM) is 0.1306 °C−1, and the maximum accuracy is 3.31 × 10−3 °C. Therefore, the proposed sensor is highly competitive in industrial automation, automotive electronics, and temperature measurement in medical devices such as cardiac monitors.