Designing and Characterizing a Multi-core PCF SPR Biosensor

In this paper, a multi-core double D like PCF based plasmonic biosensor is proposed and analyzed. The sensor performance is investigated by applying a mode solver based numerical method, FEM. Both sensible and gold coatings are deposited on the external surface for comfortable and more practical realization. This biosensor exhibits the maximum wavelength sensitivity of 8000 nm per RIU and amplitude sensitivity of 522 per RIU with resolution 1.25×10⁻⁵ RIU and 1.92×10⁻⁵ RIU respectively in the detection range between 1.45 and 1.48. This can also show good linearity with 170 FOM. Owing to the simple design and highly sensitive nature, the proposed biosensor can be precisely applicable for biomolecular analytes detection.