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    Terahertz epsilon-near-zero graded-index lens

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    Date
    2013
    Author
    Torres Landívar, Víctor Upna
    Pacheco-Peña, Víctor Upna
    Rodríguez Ulibarri, Pablo Upna
    Navarro Cía, Miguel Upna
    Beruete Díaz, Miguel Upna
    Sorolla Ayza, Mario Upna
    Engheta, Nader 
    Version
    Acceso abierto / Sarbide irekia
    xmlui.dri2xhtml.METS-1.0.item-type
    Artículo / Artikulua
    Version
    Versión publicada / Argitaratu den bertsioa
    Project Identifier
    ES/6PN/TEC2011-28664 
    Impact
     
     
     
    10.1364/OE.21.009156
     
     
     
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    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 wav ... [++]
    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. [--]
    Subject
    Epsilon-near-zero graded-index converging lenses
    Publisher
    Optical Society of America
    Published in
    Optics Express, Vol. 21, Issue 7, pp. 9156-9166 (2013)
    Departament
    Universidad Pública de Navarra. Departamento de Ingeniería Eléctrica y Electrónica / Nafarroako Unibertsitate Publikoa. Ingeniaritza Elektriko eta Elektronikoa Saila
     
    Publisher version
    https://doi.org/10.1364/OE.21.009156
    URI
    https://hdl.handle.net/2454/31109
    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.
    Appears in Collections
    • Artículos de revista DIEE - IEES Aldizkari artikuluak [346]
    • Artículos de revista - Aldizkari artikuluak [2947]
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