In this paper, surface plasmon resonance (SPR) structure along with two-dimensional (2-D) antimonene material is proposed to enhanced the photonic spin Hall effect (PSHE). It is showed that the gold (Au) based SPR structure with antimonene can effectively improve the PSHE due to the SPR effect and the strong spin-orbit coupling of antimonene. The maximum transverse beam displacement (${\mathit{\delta }}_{\mathit{H}}^{-}$) with the help of weak measurement technique for the H polarization can be up to 61.67 μm under the optimized thickness of Au layer, which is much greater than the previously reported ${\mathit{\delta }}_{\mathit{H}}^{-}$ values as well as Au based SPR structure with graphene and MoS₂. Also, SPR structure with antimonene is utilized for biosensing based on PSHE and found that the sensitivity 5468 μm/RIU, which is more than two times higher than the graphene based SPR structure. It is believed that the results may have opened a path to enhanced the PSHE in spin-based nanophotonic devices, chemical, and biological sensing.

本文提出了表面等离子体共振（SPR）结构以及二维（2-D）锑材料，以增强光子自旋霍尔效应（PSHE）。结果表明，由于锑的SPR效应和锑的强自旋轨道耦合，具有锑烯的金（Au）基SPR结构可以有效地改善PSHE。最大横梁位移（${\mathit{\delta }}_{\mathit{H}}^{-}$）借助弱测量技术，在优化的Au层厚度下，H极化可以达到61.67μm，这比以前报道的要大得多 ${\mathit{\delta }}_{\mathit{H}}^{-}$值以及具有石墨烯和MoS _2的基于Au的SPR结构。此外，具有锑烯的SPR结构被用于基于PSHE的生物传感，发现灵敏度为5468μm/ RIU，是基于石墨烯的SPR结构的两倍以上。据信，该结果可能为增强基于自旋的纳米光子器件，化学和生物传感中的PSHE开辟了道路。