Planoconcave lens by negative refraction of stacked subwavelength hole arrays
Fecha
2008Versión
Acceso abierto / Sarbide irekia
Tipo
Artículo / Artikulua
Versión
Versión publicada / Argitaratu den bertsioa
Impacto
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10.1364/OE.16.009677
Resumen
This work presents the design of a planoconcave parabolic
negative index metamaterial lens operating at millimeter wavelengths
fabricated by using stacked subwavelength hole arrays. A staircase
approximation to the ideal parabola profile has been done by removing step
by step one lattice in each dimension of the transversal section. Theory
predicts power concentration at the focal point of t ...
[++]
This work presents the design of a planoconcave parabolic
negative index metamaterial lens operating at millimeter wavelengths
fabricated by using stacked subwavelength hole arrays. A staircase
approximation to the ideal parabola profile has been done by removing step
by step one lattice in each dimension of the transversal section. Theory
predicts power concentration at the focal point of the parabola when the
refractive index equals -1. Both simulation and measurement results exhibit
an excellent agreement and an asymmetrical focus has been observed. The
possibility to design similar planoconcave devices in the terahertz and
optical wavelengths could be a reality in the near future. [--]
Materias
Planoconcave lenses,
Negative refraction,
Stacked subwavelength hole arrays
Editor
Optical Society of America
Publicado en
Optics Express,Vol. 16, Issue 13, pp. 9677-9683 (2008)
Departamento
Universidad Pública de Navarra. Departamento de Ingeniería Eléctrica y Electrónica /
Nafarroako Unibertsitate Publikoa. Ingeniaritza Elektrikoa eta Elektronikoa Saila
Versión del editor
Entidades Financiadoras
This work was supported by Spanish Government and E.U. FEDER under contracts
TEC2005-06923-C03-01 and UPN-00–33–008.