A High-Sensitivity Bimetallic Grating-Coupled Surface Plasmon Resonance Sensor Based on Two-Dimensional Materials

Optical biosensors based on grating-coupled surface plasmon resonance (GCSPR) technology are an important research topic in the field of bio-photonics. This paper presents a high-performance and high-sensitivity nanostructured bimetallic GCSPR sensor two-dimensional materials. When designing sensor, sensitivity, full width at half peak (FWHM) dip strength absorption (DS) were considered comprehensively, comprehensive evaluation parameter FOM+ is defined by making improvements basis figure merit (FOM). The performance can be judged more comprehensively. was further improved optimizing structure sensor. An ultra-thin gold layer added silver-based which solves problem easy oxidation silver metal. We tried to coat graphene oxide nanomaterials sensitivity reached 350 deg/RIU 473.23, respectively. great improvement compared with previous study, it least 74.7%. measure variety biological molecules cells high detecting change refractive index solution measured.