This work presents novel and highly sensitive Cu-Ni bimetallic surface plasmon resonance sensor based on hybrid structure of black phosphorus-antimonene for refractive index sensing of biomolecules. In this work, role of anisotropic BP for antimonene based bimetallic SPR biosensor is numerically investigated for the first time, using angular interrogation technique. First, the thicknesses of bimetals (Cu-Ni), number of BP layers and rotation angle phi for anisotropic BP based SPR structures were optimized to achieve the minimum reflectance. Then, performance factors are numerically evaluated at optimized parameters. This work achieves the highest angular sensitivity, i.e., 446.90°/RIU with optimum figure of merit than all other 2D nanomaterial based SPR sensor proposed till date. The anisotropic BP layers help to get the optically tuned ultrahigh sensitivity, making it promising SPR biosensor to explore highly anisotropic platforms for biosensing.

这项工作提出了一种基于黑磷-锑烯混合结构的新型高灵敏度铜镍双金属表面等离子体共振传感器，用于生物分子的折射率传感。在这项工作中，首次使用角度询问技术数值研究了各向异性 BP 在基于锑烯的双金属 SPR 生物传感器中的作用。首先，优化了基于各向异性 BP 的 SPR 结构的双金属 (Cu-Ni) 厚度、BP 层数和旋转角 phi 以实现最小反射率。然后，在优化参数下对性能因素进行数值评估。与迄今为止提出的所有其他基于 2D 纳米材料的 SPR 传感器相比，这项工作实现了最高的角度灵敏度，即 446.90°/RIU，具有最佳品质因数。