【摘要】 光波导表面等离激元共振（SPR）传感器具有尺寸小、免标记、易集成等优点。文章设计了一种基于波长调制方法的聚甲基丙烯酸甲酯（PMMA）脊型波导SPR传感器，并对其关键参数进行了优化。结果表明，该敏感单元在待测液折射率为1.33～1.45的范围内能够稳定工作，在高折射率检测区，传感器展现出了高达10 220 nm/RIU的灵敏度和173 RIU^-1的高品质因数。更多还原

【Abstract】 Optical-waveguide surface plasmon resonance（SPR） sensors are characterized by small sizes, label-free detection capabilities, and ease of integration. In this study, we designed a poly（methyl methacrylate）（PMMA） ridge waveguide SPR sensor sensitive unit based on a wavelength modulation method and optimized its key parameters. Our analysis results showed that the sensor could operate stably within a liquid-refractive-index testing range of 1.33～1.45. In the high-refractive-index detection region, the sensor exhibited a sensitivity of up to 10 220 nm/RIU and a high quality factor of 173 RIU^-1.更多还原