An ultra-wide detection range refractive-index sensor based on surface plasmon resonance (SPR) with photonic crystal fiber (PCF) is designed and discussed. The central air-hole of the fiber is injected with the analyte. The properties of refractive-index sensor are investigated with different structure parameters. Simulation results show that the proposed sensor has an ultra-wide detection range from 1.29 to 1.49. The refractive index sensitivities of x-polarized and y-polarized core mode are −4156.82 nm/RIU and −3703.64 nm/RIU respectively, and the corresponding linear fitting degrees are 0.99598 and 0.99236. The designed refractive-index sensor with ultra-wide detection range has a great potential in the fields of biology, chemistry, environment and medicine.

中文翻译：

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基于PCF的超宽检测范围折射率传感器

设计并讨论了一种基于表面等离子体共振 (SPR) 和光子晶体光纤 (PCF) 的超宽检测范围折射率传感器。纤维的中心气孔注入分析物。用不同的结构参数研究了折射率传感器的性能。仿真结果表明，所提出的传感器具有从 1.29 到 1.49 的超宽检测范围。x偏振和y偏振纤芯模式的折射率灵敏度分别为-4156.82 nm/RIU和-3703.64 nm/RIU，对应的线性拟合度分别为0.99598和0.99236。所设计的超宽检测范围的折光率传感器在生物、化学、环境和医学等领域具有巨大潜力。