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<p>A slot-based photonic crystal fiber (PCF) sensor that utilizes surface plasmon resonance (SPR) for the detection of temperature and refractive index (RI) is presented in this paper. The slot is coated with a gold film at the bottom, serving as the plasmonic material, and its proximity to the core enables highly sensitive temperature detection and a broad range of detection. The sensor can achieve a temperature detection range of 13&#xa0;°C to 70&#xa0;°C, with a maximum wavelength sensitivity (WS) of up to 69&#xa0;nm/°C and an average sensitivity of 19.8&#xa0;nm/°C. The RI detection range spans from 1.32 to 1.42, with a maximum WS of 5450&#xa0;nm/RIU. With its high temperature sensitivity, this sensor can monitor the cultivation environment in real time with precision. In environmental monitoring, it can effectively assess changes in the aquatic ecology and has broad application prospects. Its excellent RI detection performance endows it with great potential in various fields such as biomedicine and industrial control.</p>

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A Highly Sensitive Slot PCF-SPR Sensor for Temperature and Refractive Index Detection

  • 期刊论文

  • 发表日期：

    2025年6月30日

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  • Xu Gao,
  • Honggang Pan,
  • Qingcheng You,
  • Yukun Zhu,
  • Licui Ji,
  • Zhihua Cheng,
  • Xing Wang,
  • Xinjie Zhao,
  • Yating Tang

摘要

A slot-based photonic crystal fiber (PCF) sensor that utilizes surface plasmon resonance (SPR) for the detection of temperature and refractive index (RI) is presented in this paper. The slot is coated with a gold film at the bottom, serving as the plasmonic material, and its proximity to the core enables highly sensitive temperature detection and a broad range of detection. The sensor can achieve a temperature detection range of 13 °C to 70 °C, with a maximum wavelength sensitivity (WS) of up to 69 nm/°C and an average sensitivity of 19.8 nm/°C. The RI detection range spans from 1.32 to 1.42, with a maximum WS of 5450 nm/RIU. With its high temperature sensitivity, this sensor can monitor the cultivation environment in real time with precision. In environmental monitoring, it can effectively assess changes in the aquatic ecology and has broad application prospects. Its excellent RI detection performance endows it with great potential in various fields such as biomedicine and industrial control.