Sensing performance of Au-Ag bimetal coated planar waveguide having polyaniline polymer film for biosensing applications
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Date
2024
Journal Title
Journal of Optical Communications
Journal ISSN
Volume Title
Publisher
Walter de Gruyter GmbH
Abstract
Bimetal clad planar waveguide having polyaniline polymer as a guiding layer is proposed and studied for biosensing applications. The dispersion relation and reflectivity of the proposed sensor is obtained using transfer matrix method. The sensing performance and stability of proposed waveguide-based sensor is optimized using different volume fraction of Ag-Au bimetal. The volume fraction 1 represents pure Ag metal coating waveguide that shows maximum sensing performance in our all considered cases. In this case, maximum obtain sensitivity, detection accuracy and quality parameter is 74.140, 11.199 and 559.970�/RIU respectively, at the cover refractive index 1.410. Since, resonance angle and full width at half maxima of resonance peak decreases with increase of Ag metal percentage in Ag-Au bimetal therefore the presence of Au metal decreases the sensing performance of the sensor. Hence, a small volume fraction of Au metal is recommended for higher sensitivity with stability. � 2022 Walter de Gruyter GmbH, Berlin/Boston.
Description
Keywords
Au-Ag bimetal clad, nano-material, planar waveguide, quality factor, sensitivity