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<p>An enhanced high-sensitivity prism surface plasmon resonance refractive index sensor is proposed in our research. By etching the smooth surface of the prism into a sawtooth structure and using a combination of silver and graphene as the plasmonic material, the traditional Kretschmann configuration has been improved. This improvement enhances the interaction between the analyte and the sensing surface, thereby significantly improving the overall performance of the sensor. The results indicate that the average sensitivity of the sensor can reach 860.6°/RIU within the refractive index range of 1.330 to 1.335 RIU. Compared with the previously reported prism surface plasmon resonance refractive index sensor, the angular sensitivity of our proposed sensor is significantly improved. The proposed surface plasmon resonance sensor can be used for high-precision measurements in fields such as biosensing and medical detection and has broad application prospects.</p>

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Sensitivity Enhancement of Surface Plasmon Resonance Sensor Based on Sawtooth Structure and Graphene-Silver Layer

  • 期刊论文

  • 发表日期：

    2025年3月14日

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  • Longsheng Liu,
  • Wentao Jin,
  • Meng Song,
  • Chenhao Wei,
  • Xiaohong Sun

摘要

An enhanced high-sensitivity prism surface plasmon resonance refractive index sensor is proposed in our research. By etching the smooth surface of the prism into a sawtooth structure and using a combination of silver and graphene as the plasmonic material, the traditional Kretschmann configuration has been improved. This improvement enhances the interaction between the analyte and the sensing surface, thereby significantly improving the overall performance of the sensor. The results indicate that the average sensitivity of the sensor can reach 860.6°/RIU within the refractive index range of 1.330 to 1.335 RIU. Compared with the previously reported prism surface plasmon resonance refractive index sensor, the angular sensitivity of our proposed sensor is significantly improved. The proposed surface plasmon resonance sensor can be used for high-precision measurements in fields such as biosensing and medical detection and has broad application prospects.