Planoconcave lens by negative refraction of stacked subwavelength hole arrays.
Opt Express
; 16(13): 9677-83, 2008 Jun 23.
Article
em En
| MEDLINE
| ID: mdl-18575535
ABSTRACT
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.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Refratometria
/
Óptica e Fotônica
/
Lentes
/
Modelos Teóricos
Tipo de estudo:
Prognostic_studies
Idioma:
En
Revista:
Opt Express
Assunto da revista:
OFTALMOLOGIA
Ano de publicação:
2008
Tipo de documento:
Article
País de afiliação:
Espanha