Surface plasmon resonance photonic crystal fiber biosensor: Utilizing silver-phosphorene nanoribbons for Near-IR detection

In recent years, the utilization of two-dimensional materials in photonic crystal fiber structures has developed the capabilities of biosensors in biological and biochemical applications. A photonic crystal fiber biosensor based on surface plasmon resonance with silver and phosphorene layers is proposed in this paper. Phosphorene helps with the prevention of oxidation of the silver layer used as a plasmonic active metal. The sensor performance can be optimized by changing the structural parameters. The maximum wavelength sensitivity obtained was 1800 nm/RIU in the dynamic index range of 1.39–1.45, and the proposed sensor also showed the maximum amplitude sensitivity of 268 RIU−1 with an analyte refractive index of 1.40. The performance of the proposed sensor was analyzed using the finite element method. The results show that using phosphorene may open a new window for the study of online biomolecular interaction. •A Photonic Crystal Fiber-Surface Plasmon Resonance (PCF-SPR) biosensor with a silver-phosphorene layer is proposed.•The proposed sensor shows a maximum wavelength sensitivity of 1500 nm/RIU in the dynamic index range from 1.39 to 1.42.•The maximum amplitude sensitivity for this sensor is 364 RIU-1 with the analyte RI of 1.40.•The capabilities of sensor in biological applications are developed because of the utilization of 2D-material (BP) in PCF structure.