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Título:
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Monochromatic aberrations in resonant optical elements applied to a focusing multilevel reflectarray
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Autores:
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Ginn, James ;
Alda, Javier ;
Gómez Pedrero, José Antonio ;
Boreman, Glenn
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Tipo de documento:
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texto impreso
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Editorial:
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OSA, 2010-05
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Dimensiones:
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application/pdf
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Nota general:
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info:eu-repo/semantics/openAccess
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Idiomas:
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Física: Electromagnetismo
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Materia = Ciencias: Física: Optica
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Tipo = Artículo
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Resumen:
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The monochromatic aberrations produced by the phase distribution reflected by resonant sub-wavelength metallic structures are studied both analytically and numerically. Even for normal incidence, the angular dependence of the re-radiated wavefront disturbs the overall performance of the reflectarray. This effect is modelled as combination of a linear and a cubic dependence. A complete numerical simulation of a multilevel focusing reflectarray is performed using computational-electromagnetic and physical-optics-propagation methods. A modified Strehl ratio is defined to show the dependence of the focused spot behavior on aperture. The irradiance distribution is dependent on the polarization state. A small-aperture focusing reflectarray has been designed, fabricated, and tested. The irradiance distribution at the focusing plane is compared with the simulated one, showing a good agreement when residual wavefront aberrations are included.
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En línea:
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https://eprints.ucm.es/36467/1/oe-18-11-10931.pdf
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