Exploiting the dispersion of the double-negative-index fishnet metamaterial to create a broadband low-profile metallic lens

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Exploiting the dispersion of the double-negative-index fishnet metamaterial to create a broadband low-profile metallic lens. / Orazbayev, B.; Pacheco-Peña, V.; Beruete, M.; Navarro-Cia, Miguel.

In: Optics Express, Vol. 23, No. 7, 06.04.2015, p. 8555-8564.

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@article{35c3d72fb78a43a18cee2d14608feb49,
title = "Exploiting the dispersion of the double-negative-index fishnet metamaterial to create a broadband low-profile metallic lens",
abstract = "Metamaterial lenses with close values of permittivity and permeability usually display low reflection losses at the expense of narrow single frequency operation. Here, a broadband low-profile lens is designed by exploiting the dispersion of a fishnet metamaterial together with the zoning technique. The lens operates in a broadband regime from 54 GHz to 58 GHz, representing a fractional bandwidth ∼7%, and outperforms Silicon lenses between 54 and 55.5 GHz. This broadband operation is demonstrated by a systematic analysis comprising Huygens-Fresnel analytical method, full-wave numerical simulations and experimental measurements at millimeter waves. For demonstrative purposes, a detailed study of the lens operation at two frequencies is done for the most important lens parameters (focal length, depth of focus, resolution, radiation diagram). Experimental results demonstrate diffraction-limited ∼0.5λ transverse resolution, in agreement with analytical and numerical calculations. In a lens antenna configuration, a directivity as high as 16.6 dBi is achieved. The different focal lengths implemented into a single lens could be potentially used for realizing the front end of a non-mechanical zoom millimeter-wave imaging system.",
author = "B. Orazbayev and V. Pacheco-Pe{\~n}a and M. Beruete and Miguel Navarro-Cia",
year = "2015",
month = apr
day = "6",
doi = "10.1364/OE.23.008555",
language = "English",
volume = "23",
pages = "8555--8564",
journal = "Optics Express",
issn = "1094-4087",
publisher = "Optical Society of America",
number = "7",

}

RIS

TY - JOUR

T1 - Exploiting the dispersion of the double-negative-index fishnet metamaterial to create a broadband low-profile metallic lens

AU - Orazbayev, B.

AU - Pacheco-Peña, V.

AU - Beruete, M.

AU - Navarro-Cia, Miguel

PY - 2015/4/6

Y1 - 2015/4/6

N2 - Metamaterial lenses with close values of permittivity and permeability usually display low reflection losses at the expense of narrow single frequency operation. Here, a broadband low-profile lens is designed by exploiting the dispersion of a fishnet metamaterial together with the zoning technique. The lens operates in a broadband regime from 54 GHz to 58 GHz, representing a fractional bandwidth ∼7%, and outperforms Silicon lenses between 54 and 55.5 GHz. This broadband operation is demonstrated by a systematic analysis comprising Huygens-Fresnel analytical method, full-wave numerical simulations and experimental measurements at millimeter waves. For demonstrative purposes, a detailed study of the lens operation at two frequencies is done for the most important lens parameters (focal length, depth of focus, resolution, radiation diagram). Experimental results demonstrate diffraction-limited ∼0.5λ transverse resolution, in agreement with analytical and numerical calculations. In a lens antenna configuration, a directivity as high as 16.6 dBi is achieved. The different focal lengths implemented into a single lens could be potentially used for realizing the front end of a non-mechanical zoom millimeter-wave imaging system.

AB - Metamaterial lenses with close values of permittivity and permeability usually display low reflection losses at the expense of narrow single frequency operation. Here, a broadband low-profile lens is designed by exploiting the dispersion of a fishnet metamaterial together with the zoning technique. The lens operates in a broadband regime from 54 GHz to 58 GHz, representing a fractional bandwidth ∼7%, and outperforms Silicon lenses between 54 and 55.5 GHz. This broadband operation is demonstrated by a systematic analysis comprising Huygens-Fresnel analytical method, full-wave numerical simulations and experimental measurements at millimeter waves. For demonstrative purposes, a detailed study of the lens operation at two frequencies is done for the most important lens parameters (focal length, depth of focus, resolution, radiation diagram). Experimental results demonstrate diffraction-limited ∼0.5λ transverse resolution, in agreement with analytical and numerical calculations. In a lens antenna configuration, a directivity as high as 16.6 dBi is achieved. The different focal lengths implemented into a single lens could be potentially used for realizing the front end of a non-mechanical zoom millimeter-wave imaging system.

UR - http://www.scopus.com/inward/record.url?scp=84928036657&partnerID=8YFLogxK

U2 - 10.1364/OE.23.008555

DO - 10.1364/OE.23.008555

M3 - Article

AN - SCOPUS:84928036657

VL - 23

SP - 8555

EP - 8564

JO - Optics Express

JF - Optics Express

SN - 1094-4087

IS - 7

ER -