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<p>Surface plasmon resonance (SPR) sensors are gaining increasing attention in the field of temperature sensing. To achieve a high-performance SPR sensing structure more comprehensively and efficiently, this paper introduces the non-dominated sorting genetic algorithm II (NSGA II) algorithm into the optimization process of SPR sensing structures and the concept of an equivalent grating, where a BaTiO<sub>3</sub> grating is equivalently substituted by a thin film to further enhance sensing accuracy. Based on the temperature-sensitive material polydimethylsiloxane (PDMS), and through the incorporation of two-dimensional (2D) materials to modify the structural composition and thickness, an optimal quality temperature sensor is obtained. When illuminated with monochromatic light at 632.8&#xa0;nm, the BaTiO₃(grating)-Ag-WS₂-BP-PDMS structure achieves a sensitivity of − 0.114°/K within the temperature range of 310–360&#xa0;K. Fixing the incident angle at 75° and using monochromatic light with wavelengths ranging from 532 to 780&#xa0;nm, the Ag-Graphene-PDMS structure reaches a sensitivity of − 1.35&#xa0;nm/K within the same temperature range. The proposed sensors maintain high linearity while exhibiting excellent sensitivity and figure of merit.</p>

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NSGA II Calculated Surface Plasmon Resonance-Based Temperature Sensor

  • 期刊论文

  • 发表日期：

    2025年3月7日

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  • Chunfeng Shen,
  • Yan Guo,
  • Jingcheng Zhang,
  • Kaihua Wu

摘要

Surface plasmon resonance (SPR) sensors are gaining increasing attention in the field of temperature sensing. To achieve a high-performance SPR sensing structure more comprehensively and efficiently, this paper introduces the non-dominated sorting genetic algorithm II (NSGA II) algorithm into the optimization process of SPR sensing structures and the concept of an equivalent grating, where a BaTiO3 grating is equivalently substituted by a thin film to further enhance sensing accuracy. Based on the temperature-sensitive material polydimethylsiloxane (PDMS), and through the incorporation of two-dimensional (2D) materials to modify the structural composition and thickness, an optimal quality temperature sensor is obtained. When illuminated with monochromatic light at 632.8 nm, the BaTiO₃(grating)-Ag-WS₂-BP-PDMS structure achieves a sensitivity of − 0.114°/K within the temperature range of 310–360 K. Fixing the incident angle at 75° and using monochromatic light with wavelengths ranging from 532 to 780 nm, the Ag-Graphene-PDMS structure reaches a sensitivity of − 1.35 nm/K within the same temperature range. The proposed sensors maintain high linearity while exhibiting excellent sensitivity and figure of merit.