Document Type : Research
Authors
1 Department of Electrical Engineering, Faculty of Engineering, Shahid Chamran University of Ahvaz, Ahvaz.
2 Department of Electrical Engineering,, Shahid Chamran University of Ahvaz, Ahvaz, Iran
3 Department of Electronics and Communication Engineering, Dibrugarh University, Assam-786004, India.
Abstract
In this research, a sensor based on surface plasmon resonance with a BK7/ZnO/Ag/ZnO/WSe2 structure is proposed for detecting the dengue virus based on blood hemoglobins, operating at a wavelength of 633 nm. A BK7 prism is used to couple light into the structure. The layer arrangement of the structure consists of a silver film as the main plasmonic material, two ZnO layers that enclose the silver film; the first to compensate for the weak bonding between the silver and the prism, and the second to protect the silver against oxidation and corrosion as well as to improve sensitivity, and one layer of two-dimensional WSe2 material to enhance sensitivity and increase biomolecular interaction. The structure was designed and simulated using COMSOL software. The obtained values for the sensor parameters are sensitivity of 49.287 °/RIU, full width at half maximum of 2.669°, detection accuracy of 0.3747 deg-1, quality factor of 107.72 RIU-1, and signal-to-noise ratio of 3.77. The effects of the thickness of the Ag and ZnO layers and the number of WSe2 layers on the sensor’s performance were also investigated.
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