Tripod-loop metasurfaces for terahertz-sensing applications: a comparison

Jáuregui López, Irati; Orazbayev, Bakhtiyar; Pacheco-Peña, Víctor; Beruete Díaz, Miguel

Publication:
Tripod-loop metasurfaces for terahertz-sensing applications: a comparison

dc.contributor.author	Jáuregui López, Irati
dc.contributor.author	Orazbayev, Bakhtiyar
dc.contributor.author	Pacheco-Peña, Víctor
dc.contributor.author	Beruete Díaz, Miguel
dc.contributor.department	Ingeniería Eléctrica, Electrónica y de Comunicación	es_ES
dc.contributor.department	Institute of Smart Cities - ISC	en
dc.contributor.department	Ingeniaritza Elektrikoa, Elektronikoaren eta Telekomunikazio Ingeniaritzaren	eu
dc.date.accessioned	2020-09-18T08:50:54Z
dc.date.available	2020-09-18T08:50:54Z
dc.date.issued	2020
dc.description.abstract	The high electric field intensity achieved on the surface of sensors based on metasurfaces (metasensors) makes them an excellent alternative for sensing applications where the volume of the sample to be identified is tiny (for instance, thin-film sensing devices). Various shapes and geometries have been proposed recently for the design of these metasensors unit-cells (meta-atoms) such as split ring resonators or hole arrays, among others. In this paper, we propose, design, and evaluate two types of tripod metasurfaces with different complexity in their geometry. An in-depth comparison of their performance is presented when using them as thin-film sensor devices. The meta-atoms of the proposed metasensors consist of a simple tripod and a hollow tripod structure. From numerical calculations, it is shown that the best geometry to perform thin-film sensing is the compact hollow tripod (due to the highest electric field on its surface) with a mean sensitivity of 3.72 × 10−5 nm−1. Different modifications are made to this structure to improve this value, such as introducing arms in the design and rotating the metallic pattern 30 degrees. The best sensitivity achieved for extremely thin film analytes (5–25 nm thick) has an average value of 1.42 × 10−4 nm, which translates into an extremely high improvement of 381% with respect to the initial hollow tripod structure. Finally, a comparison with other designs found in the literature shows that our design is at the top of the ranking, improving the overall performance by more than one order of magnitude. These results highlight the importance of using metastructures with more complex geometries so that a higher electric field intensity distribution and, therefore, designs with better performance can be obtained.	en
dc.description.sponsorship	This research was funded by Spanish Ministerio de Ciencia, Innovación y Universidades, Project RTI2018-094475-B-I00 (MCIU/AEI/FEDER,UE).	en
dc.format.extent	9 p.
dc.format.mimetype	application/pdf	en
dc.identifier.doi	10.3390/app10186504
dc.identifier.issn	2076-3417
dc.identifier.uri	https://academica-e.unavarra.es/handle/2454/38152
dc.language.iso	eng	en
dc.publisher	MDPI	en
dc.relation.ispartof	Applied Sciences 2020, 10, 6504	en
dc.relation.publisherversion	https://doi.org/10.3390/app10186504
dc.rights	© 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license.	en
dc.rights.accessRights	Acceso abierto / Sarbide irekia	es
dc.rights.accessRights	info:eu-repo/semantics/openAccess	en
dc.rights.uri	http://creativecommons.org/licenses/by/4.0/
dc.subject	Metasensors	en
dc.subject	Metasurfaces	en
dc.subject	Sensing	en
dc.subject	Terahertz	en
dc.subject	Thin-film	en
dc.subject	Tripod	en
dc.title	Tripod-loop metasurfaces for terahertz-sensing applications: a comparison	en
dc.type	Artículo / Artikulua	es
dc.type	info:eu-repo/semantics/article	en
dc.type.version	Versión publicada / Argitaratu den bertsioa	es
dc.type.version	info:eu-repo/semantics/publishedVersion	en
dspace.entity.type	Publication
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