A mirrored bilayer structure incorporating layers of Graphene and MoS₂ is proposed here for Surface Plasmon Resonance (SPR) biosensing and its performance is evaluated numerically. Starting from the basic configuration, the structure with graphene and $Mo{S}_2$ layers is gradually developed for enhanced performance. Reflectance is the main considered parameter for performance analysis. A theoretical framework based on Fresnel's equations is presented and by measuring reflectance versus angle of incidence, sensitivity is calculated from the displacement of SPR angle using finite-difference time-domain (FDTD) technique. Our numerical analysis shows that using the proposed approach, about 4.2 times enhanced sensitivity can be achieved compared to the basic Kretschmann configuration. Notably, the structure provides enhancement for both angular and wavelength interrogations. Furthermore, simulations have been repeated for various ligate–ligand pairs and consistent enhancement has been observed which proves the robustness of the structure. So, the proposed sensor architecture clearly provides pronounced improvement in sensitivity which can be significant in various practical applications.

在此提出了一种结合了石墨烯和MoS ₂层的镜面双层结构，用于表面等离子体共振（SPR）生物传感，并对其性能进行了数值评估。从基本配置开始，石墨烯和$\mathrm{中号}Ø{\mathrm{小号}}_2$逐渐开发出层以增强性能。反射率是性能分析的主要考虑参数。提出了一种基于菲涅尔方程的理论框架，通过测量反射率与入射角的关系，使用有限差分时域（FDTD）技术根据SPR角的位移计算出灵敏度。我们的数值分析表明，与基本的Kretschmann配置相比，使用建议的方法可以将灵敏度提高约4.2倍。值得注意的是，该结构为角度和波长询问提供了增强。此外，已经对各种连接基-配体对进行了重复仿真，并观察到一致的增强，这证明了该结构的坚固性。所以，