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Article

Sensitivity Characterization of Multi-Band THz Metamaterial Sensor for Possible Virus Detection

School of Electrical Engineering, University of Belgrade, Bulevar Kralja Aleksandra 73, P.O. Box 35-54, 11120 Belgrade, Serbia
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Academic Editors: Padmanabhan Balasubramanian, Lidia Dobrescu and Yahya M. Meziani
Electronics 2022, 11(5), 699; https://doi.org/10.3390/electronics11050699
Received: 31 December 2021 / Revised: 4 February 2022 / Accepted: 11 February 2022 / Published: 24 February 2022
(This article belongs to the Special Issue Advances in Micro- and Nano-Electronics)
The recent COVID-19 pandemic has shown that there is a substantial need for high-precision reliable diagnostic tests able to detect extremely low virus concentrations nearly instantaneously. Since conventional methods are fairly limited, there is a need for an alternative method such as THz spectroscopy with the utilization of THz metamaterials. This paper proposes a method for sensitivity characterization, which is demonstrated on two chosen multi-band THz metamaterial sensors and samples of three different subtypes of the influenza A virus. Sensor models have been simulated in WIPL-D software in order to analyze their sensitivity both graphically and numerically around all resonant peaks in the presence of virus samples. The sensor with a sandwiched structure is shown to be more suitable for detecting extremely thin virus layers. The distribution of the electric field for this sensor suggests a possibility of controlling the two resonant modes independently. The sensor with cross-shaped patches achieves significantly better Q-factors and refractive sensitivities for both resonant peaks. The reasoning can be found in the wave–sample interaction enhancement due to the better electromagnetic field confinement. A high Q-factor of around 400 at the second resonant frequency makes the sensor with cross-shaped patches a promising candidate for potential applications in THz sensing. View Full-Text
Keywords: influenza A; metamaterials; sensitivity; sensors; THz spectroscopy influenza A; metamaterials; sensitivity; sensors; THz spectroscopy
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MDPI and ACS Style

Kovačević, A.; Potrebić, M.; Tošić, D. Sensitivity Characterization of Multi-Band THz Metamaterial Sensor for Possible Virus Detection. Electronics 2022, 11, 699. https://doi.org/10.3390/electronics11050699

AMA Style

Kovačević A, Potrebić M, Tošić D. Sensitivity Characterization of Multi-Band THz Metamaterial Sensor for Possible Virus Detection. Electronics. 2022; 11(5):699. https://doi.org/10.3390/electronics11050699

Chicago/Turabian Style

Kovačević, Anja, Milka Potrebić, and Dejan Tošić. 2022. "Sensitivity Characterization of Multi-Band THz Metamaterial Sensor for Possible Virus Detection" Electronics 11, no. 5: 699. https://doi.org/10.3390/electronics11050699

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