波长调制型PMMA光波导SPR折射率传感器设计

Design on Wavelength-Modulated PMMA Optical Waveguide SPR Refractive Index Sensor

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。本文设计了一种基于波长调制方法的聚甲基丙烯酸甲酯（PMMA）脊形波导SPR传感器，并对传感器的关键参数进行了优化。分析结果表明，该传感器在待测液折射率为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10220 nm/RIU的灵敏度和173 RIU-1的高品质因数。

Abstract:

Optical waveguide surface plasmon resonance (SPR) sensors are characterized by their small size, label-free detection, and ease of integration. In this paper, we designed a poly(methyl methacrylate) (PMMA) ridge waveguide SPR sensor based on a wavelength modulation method and optimized the key parameters of the sensor. The analysis results indicate that the sensor can operate stably within a testing range of the liquid refractive index from 1.33 to 1.45. In the high refractive index detection region, the sensor exhibits a sensitivity of up to 10220 nm/RIU and a high-quality factor of 173 RIU-1.