Browsing by Author "Awsaf, S M Azmain"

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    Design of a Highly Sensitive Photonic Crystal Fibre Sensor for Detecting Biochemical Analytes
    (Department of Electrical and Elecrtonics Engineering(EEE), Islamic University of Technology(IUT), Board Bazar, Gazipur-1704, Bangladesh, 2024-06-25) Dola, Fariba Tabassum; Awsaf, S M Azmain; Apon, Jubair Mahamud
    We proffer in this research a distinctive, facile to fabricate, and highly sensitive photonic crystal fiber (PCF) biosensor based on the phenomenon of surface plasmon resonance (SPR). Our prototype has a strategic pattern of circular air holes inside the fiber, which leads to a superior sensing performance. The evaluation of all the sensor characteristics has been discharged by employing the finite element method (FEM) of COMSOL Multiphysics. The gold (Au) layer just around the fiber acts as the plasmonic material. After the optimization of all the fiber parameters, we derived a maximum amplitude sensitivity (AS) and wavelength sensitivity (WS) of 2202.64 RIU− 1 and 140,500 nm/RIU, respectively, with a maximum sensor resolution 7.11 × 10− 7 for wavelength and 4.54 × 10− 4 for amplitude. Moreover, the maximum figure of merit (FOM) procured was 2285. The overall analyte sensing range is from refractive indices 1.31 to 1.40, and the sensor has a fabrication tolerance limit of ±5% for the gold layer variation and ±2.5% for both of the air holes. With its enhanced performance in terms of sensitivity, we believe that this SPR-based PCF biosensor can potentially contribute to the detection of unknown analytes and in applications of medical diagnostics.