Surface plasmon resonance based photonic crystal fiber sensor for bio samples detection

• Published in: European physical journal plus 2024-07, Vol.139 (7), p.577, Article 577
• Main Authors: Meshginqalam, Bahar, Barvestani, Jamal
• Format: Article
• Language: English
• Subjects: Applied and Technical Physics; Atomic; Chemical vapor deposition; Complex Systems; Condensed Matter Physics; Crystal fibers; Fabrication; Figure of merit; Finite element analysis; Finite element method; Gold; Investigations; Lead; Mathematical and Computational Physics; Molecular; Optical and Plasma Physics; Photonic crystals; Physics; Physics and Astronomy; Refractivity; Regular Article; Resonance; Sensors; Surface plasmon resonance; Theoretical
• ISSN: 2190-5444; 2190-5444
• DOI: 10.1140/epjp/s13360-024-05379-6

A novel photonic crystal fiber sensor based on surface plasmon resonance with a broad detection range was designed. Gold is selected as the plasmonic material with an external coating approach which simplifies the detection process and device fabrication. The sensing characteristics were investigated using the finite element method (FEM). Because both the x and y-polarized modes result in nearly the same loss properties, the obtained responses are declared for the y-polarized mode. The confinement loss analysis leads to maximum wavelength and amplitude sensitivities of 30,000  nm / RIU and 7174  RIU - 1 . Moreover, high figure of merit and good resolution values of 768.64  RIU - 1 and 3.33 × 10 - 6   RIU are calculated for the analyte refractive index (RI) range from 1.33 to 1.42. Good performance parameters beside to fabrication simplicity introduce the proposed sensor as a suitable platform for the precise detection of various bio samples.