Design of a nanoscale gold-coated photonic crystal fiber biosensor

A simple two-layer refractive index sensor based on surface plasmon resonance has been proposed in this work, which evinces high sensitivity for detecting unknown analytes. This design includes hexagonal- and octagonal-shaped air-hole rings, have introduced the first second layers, respectively. By performing amalgamation of different types air holes, gold-coated plasmonic sensing scheme provides broad limit analyte, is 1.32–1.40. The performance examined by applying finite element method, being used modeling complex irregular-shaped geometry. wavelength interrogation method demonstrated a maximal 9,000 nm/RIU (refractive unit). amplitude 1902 RIU −1 exhibited y-polarized mode using method. Moreover, resolution 1.11 × 10 −5 covers entire range. Furthermore, adjusting diameter, pitch, depth gold layer coating, many more investigations design. highly sensitive very convincing to be applications like chemical, biological, also physical analyses.