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A novel method of plasmon coupled optical waveguide for aerosol sensor
Russian version
DOI: 10.21883/EOS.2022.14.54000.1014-21
Kumar Sushil1, Sharma Gaurav2, Yadav Gulab Chand2, Singh Vivek2, Singh Abhay Kumar2
1Department of Physics, Sri Shankar College Sasaram (Constituent Body of Veer Kunwar Singh University Ara), Rohtas, Bihar, India
2Department of Physics, Institute of Science, Banaras Hindu University, Varanasi, Uttar Pradesh India
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The tropospheric aerosol characterization is important for understanding environmental process as well as human health safety. In this study, the surface plasmon resonance sensor is proposed for the detection of ammonium sulfate which is an important component of aerosols. The reflectivity of proposed sensor waveguides is calculated as a function of the incident angle using the transfer matrix method. The performance of proposed sensors having sol-gel film of tetraethylorthosilane and thymolblue are studied and compared. Firstly, the dispersion characteristics are obtained for different modes, and it is observed that the modes are tightly bound in thymol blue waveguide in comparison to tetraethylorthosilane waveguide. Further, the magnetic field distributions are also studied and compared for proposed waveguide sensor configurations. It is found that the sol-gel film of thymol blue waveguide provides high sensitivity while tetraethylorthosilane waveguide shows high figure of merit. Keywords: aerosol, surface plasmon resonance sensor, reflectivity, sensitivity, detection accuracy.
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