Dual microchannel (MCh) assist photonic crystal fiber-based plasmonic sensor has been proposed to detect a maximum of two analytes simultaneously. The proposed sensor will improve the detection time and accuracy. The performance of the sensor is investigated using the finite element method. Due to the symmetric structure, the proposed sensor shows similar performance for both channels. The sensor can be applied for both cases single and multi-analyte detection. The sensor exhibits the maximum wavelength sensitivity (WS) of 11,000 nm/RIU and amplitude sensitivity (AS) of 922 RIU-1for y-polarized modes, respectively. Due to the multi-analyte detection ability, the proposed sensor will be a suitable candidate for real-time biological and organic chemicals detections.
A photonic crystal fiber (PCF)-based plasmonic biosensor for coronavirus detection is analyzed numerically. This can detect COVID spike protein, antibody and the viral ribonucleic acid (RNA) using multi-analyte sensing approach. It is optimized for the specific analytes’ refractive index (RI) range. The sensor shows the average wavelength sensitivities of 2,009 nm/RIU for the protein spike, 1984 nm/RIU for the antibody spike and 2745 nm/RIU for the mutant RNA spike, respectively. The corresponding amplitude sensitivities are 135 RIU-1, 140 RIU-1 and 196 RIU-1. We anticipate the proposed sensor to be a competitive candidate for rapid multi-analyte point-of-care COVID detection.
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