In this paper, a refractive index biosensor is proposed which employs Si photonic nanorings coupled to ring-shaped plasmonic nanohole arrays (PNA) on a hybrid substrate to facilitate sensing of different glucose concentrations in water solution. The proposed structure can be used as a single-mode refractive index biosensor with a high sensitivity of 1278 nm/RIU, a figure of merit (FoM) of 168.1 RIU⁻¹, and good detection accuracy of 0.13 nm⁻¹. The sensitivity and FoM values of the proposed structure are highest in comparison with many reported structures in recent years, while it uses a simple structural topology. The effects of various structural parameters on the reflection spectrum and sensing performance are comprehensively surveyed using the 3D FDTD method. Using the proposed structure, the strength of the interaction between the applied light and the analyte is effectively enhanced and the propagation loss is relatively reduced. Hence, the designed structure is an appropriate candidate for ultrasensitive biosensing applications.

在本文中，提出了一种折射率生物传感器，它采用与混合基板上的环形等离子体纳米孔阵列 (PNA) 耦合的 Si 光子纳米环，以促进对水溶液中不同葡萄糖浓度的传感。该结构可用作单模折射率生物传感器，具有 1278 nm/RIU 的高灵敏度、168.1 RIU ^-1的品质因数 (FoM)和 0.13 nm ^{-1 的}良好检测精度. 与近年来报道的许多结构相比，所提出的结构的灵敏度和 FoM 值最高，同时它使用了简单的结构拓扑。使用3D FDTD方法综合考察了各种结构参数对反射光谱和传感性能的影响。使用所提出的结构，施加的光与分析物之间的相互作用的强度被有效地增强并且传播损耗相对降低。因此，设计的结构是超灵敏生物传感应用的合适候选者。