Sensing performance of Au–Ag bimetal coated planar waveguide having polyaniline polymer film for biosensing applications
Author:
Yadav Dharamjeet1, Kumar Rajendra1, Kumar Sushil2, Sharma Gaurav3, Yadav Gulab Chand3, Singh Vivek3
Affiliation:
1. Department of Electronics and Communication Engineering , Faculty of Engineering and Technology, Rama University , Kanpur 208017 , Uttar Pradesh , India 2. Department of Physics , Sri Shankar College Sasaram (Constituent Body of Veer Kunwar Singh University Ara) , Rohtas 821115 , Bihar , India 3. Department of Physics , Institute of Science, Banaras Hindu University , Varanasi 221005 , Uttar Pradesh , India
Abstract
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.
Publisher
Walter de Gruyter GmbH
Subject
Electrical and Electronic Engineering,Condensed Matter Physics,Atomic and Molecular Physics, and Optics
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