SARS-CoV-2 detecting rapid metasurface-based sensor.

We have proposed a novel approach to detect COVID-19 by detecting the ethyl butanoate which high volume ratio is present in the exhaled breath of a COVID-19 infected person. We have employed a refractive index sensor (RIS) with the help of a metasurface-based slotted T-shape perfect absorber that can detect ethyl butanoate present in exhaled breath of COVID-19 infected person with high sensitivity and in-process SARS-CoV-2. The optimized structure of the sensor is obtained by varying several structure parameters including structure length and thickness, slotted T-shape resonator length, width, and thickness. Sensor's performance is evaluated based on numerous factors comprising of sensitivity, Q factor, detection limit, a figure of merit (FOM), detection accuracy, and other performance defining parameters. The proposed slotted T-shape RIS achieved the largest sensitivity of 2500 nm/RIU, Q factor of 131.06, a FOM of 131.58 RIU−1, detection limit of 0.0224 RIU. [Display omitted] • A novel approach of COVID-19 detection through dry exhaled breath is proposed. • A graphene metasurface based sensor is proposed. • Highest sensitivity of 2500 nm/RIU, Q factor of 131.06, and FOM of 131.58 RIU−1 is achieved. • Proposed sensor has the detection limit of 0.0224 RIU. [ABSTRACT FROM AUTHOR]