Terahertz epsilon-near-zero graded-index lens

Torres Landívar, Víctor; Pacheco-Peña, Víctor; Rodríguez Ulibarri, Pablo; Navarro Cía, Miguel; Beruete Díaz, Miguel; Sorolla Ayza, Mario; Engheta, Nader

Publication:
Terahertz epsilon-near-zero graded-index lens

dc.contributor.author	Torres Landívar, Víctor
dc.contributor.author	Pacheco-Peña, Víctor
dc.contributor.author	Rodríguez Ulibarri, Pablo
dc.contributor.author	Navarro Cía, Miguel
dc.contributor.author	Beruete Díaz, Miguel
dc.contributor.author	Sorolla Ayza, Mario
dc.contributor.author	Engheta, Nader
dc.contributor.department	Ingeniería Eléctrica y Electrónica	es_ES
dc.contributor.department	Ingeniaritza Elektrikoa eta Elektronikoa	eu
dc.contributor.funder	Gobierno de Navarra / Nafarroako Gobernua, 055/01/11	es
dc.date.accessioned	2018-10-23T07:35:27Z
dc.date.available	2018-10-23T07:35:27Z
dc.date.issued	2013
dc.description.abstract	An epsilon-near-zero graded-index converging lens with planar faces is proposed and analyzed. Each perfectly-electric conducting (PEC) waveguide comprising the lens operates slightly above its cut-off frequency and has the same length but different cross-sectional dimensions. This allows controlling individually the propagation constant and the normalized characteristic impedance of each waveguide for the desired phase front at the lens output while Fresnel reflection losses are minimized. A complete theoretical analysis based on the waveguide theory and Fermat’s principle is provided. This is complemented with numerical simulation results of two-dimensional and three-dimensional lenses, made of PEC and aluminum, respectively, and working in the terahertz regime, which show good agreement with the analytical work.	en
dc.description.sponsorship	Effort sponsored by Spanish Government under contracts Consolider “Engineering Metamaterials” CSD2008-00066 and TEC2011-28664-C02-01. P.R.-U. is sponsored by the Government of Navarra under funding program “Formación de tecnólogos” 055/01/11. M.N.- C. is supported by the Imperial College Junior Research Fellowship. M. B. acknowledges funding by the Spanish Government under the research contract program Ramon y Cajal RYC-2011-08221. N.E. acknowledges the support from the US Office of Naval Research (ONR) Multidisciplinary University Research Initiatives (MURI) grant number N00014-10-1- 0942.	en
dc.format.extent	11 p.
dc.format.mimetype	application/pdf	en
dc.identifier.doi	10.1364/OE.21.009156
dc.identifier.issn	1094-4087 (Electronic)
dc.identifier.uri	https://academica-e.unavarra.es/handle/2454/31109
dc.language.iso	eng	en
dc.publisher	Optical Society of America	en
dc.relation.ispartof	Optics Express, Vol. 21, Issue 7, pp. 9156-9166 (2013)	en
dc.relation.projectID	info:eu-repo/grantAgreement/MICINN//TEC2011-28664-C02-01/ES/	en
dc.relation.publisherversion	https://doi.org/10.1364/OE.21.009156
dc.rights	© 2013 Optical Society of America. Users may use, reuse, and build upon the article, or use the article for text or data mining, so long as such uses are for non-commercial purposes and appropriate attribution is maintained. All other rights are reserved.	en
dc.rights.accessRights	info:eu-repo/semantics/openAccess
dc.subject	Epsilon-near-zero graded-index converging lenses	en
dc.title	Terahertz epsilon-near-zero graded-index lens	en
dc.type	info:eu-repo/semantics/article
dc.type.version	info:eu-repo/semantics/publishedVersion	en
dc.type.version	Versión publicada / Argitaratu den bertsioa	es
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