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Open AccessArticle

Labyrinth Metasurface for Biosensing Applications: Numerical Study on the New Paradigm of Metageometries

1
Antennas Group-TERALAB, Universidad Pública de Navarra, Campus Arrosadía, 31006 Pamplona, Spain
2
Multispectral Biosensing Group, Navarrabiomed, Complejo Hospitalario de Navarra (CHN), Universidad Pública de Navarra (UPNA), IdiSNA. Irunlarrea 3, 31008 Pamplona, Navarra, Spain
3
Rzhanov Institute of Semiconductor Physics SB RAS, Novosibirsk Branch “TDIAM”, Lavrentiev Ave. 2/1, 630090 Novosibirsk, Russia
4
Novosibirsk State University, Pirogova St. 2, 630090 Novosibirsk, Russia
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Institute of Smart Cities (ISC), Public University of Navarra, 31006 Pamplona, Spain
*
Author to whom correspondence should be addressed.
Sensors 2019, 19(20), 4396; https://doi.org/10.3390/s19204396
Received: 13 September 2019 / Revised: 7 October 2019 / Accepted: 9 October 2019 / Published: 11 October 2019
(This article belongs to the Special Issue Thin Film Biosensing)
The use of metasurfaces operating in the terahertz regime as biosensor devices has attracted increased interest in recent years due to their enhanced sensitivity and more accurate detection capability. Typical designs are based on the replica of relatively simple unit cells, usually called metaatoms. In a previous paper, we proposed a new paradigm for ultrasensitive thin-film sensors based on complex unit cells, called generically metageometries or labyrinth metasurfaces. Here, we extend this concept towards biosensing, evaluating the performance of the labyrinth as a fungi detector. The sensing capabilities are numerically evaluated and a comparison with previous works in this field is performed, showing that metageometries improve the performance compared to metaatoms both in sensitivity and figure of merit, by a factor of more than four. In particular, we find that it is able to detect five fungi elements scattered on the unit cell, equivalent to a concentration of only 0.004/µm2. View Full-Text
Keywords: metasurface; terahertz; biosensor metasurface; terahertz; biosensor
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Jáuregui-López, I.; Rodríguez-Ulibarri, P.; Kuznetsov, S.A.; Quemada, C.; Beruete, M. Labyrinth Metasurface for Biosensing Applications: Numerical Study on the New Paradigm of Metageometries. Sensors 2019, 19, 4396.

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