Transformation-optical design of adaptive beam bends and beam expanders.
Opt Express
; 16(15): 11555-67, 2008 Jul 21.
Article
em En
| MEDLINE
| ID: mdl-18648477
ABSTRACT
We describe the design of adaptive beam bends and beam splitters with arbitrary bend and split angles by use of finite embedded coordinate transformations. The devices do not exhibit reflection at the entrance or exit surfaces. It is shown that moderate and practically achievable values of the relative permittivity and permeability can be obtained for beam bends and splitters with both small and large bend radius. The devices are also discussed in the context of reconfigurable metamaterials, in which the bend and split angles can be dynamically tuned. The performance of adaptive beam bends and splitters is demonstrated in full wave simulations based on a finite-element method. Furthermore, the design of an adaptively adjustable transformation-optical beam expander/compressor is presented. It is observed that a pure transformation-optical design cannot result in a reflectionless beam expander/compressor.
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01-internacional
Base de dados:
MEDLINE
Assunto principal:
Refratometria
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Desenho Assistido por Computador
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Óptica e Fotônica
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Manufaturas
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Modelos Teóricos
Idioma:
En
Revista:
Opt Express
Assunto da revista:
OFTALMOLOGIA
Ano de publicação:
2008
Tipo de documento:
Article
País de afiliação:
Estados Unidos