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Optimized square Fresnel zone plates for microoptics applications

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Rico-García, José María and Salgado Remacha, Francisco Javier and Sánchez Brea, Luis Miguel and Alda, Javier (2009) Optimized square Fresnel zone plates for microoptics applications. In Modeling Aspects in Optical Metrology II. Proceedings of SPIE (7390). SPIE, Bellingham (USA), pp. 739011-1. ISBN 9780819476739

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Official URL: http://dx.doi.org/10.1117/12.827546




Abstract

Polygonal Fresnel zone plates with a low number of sides have deserved attention in micro and nanoptics, because they can be straightforwardly integrated in photonic devices, and, at the same time, they represent a balance between the high-focusing performance of a circular zone plate and the easiness of fabrication at micro and nano-scales of polygons. Among them, the most representative family are Square Fresnel Zone Plates (SFZP). In this work, we propose two different customized designs of SFZP for optical wavelengths. Both designs are based on the optimization of a SFZP to perform as close as possible as a usual Fresnel Zone Plate. In the first case, the criterion followed to compute it is the minimization of the difference between the area covered by the angular sector of the zone of the corresponding circular plate and the one covered by the polygon traced on the former. Such a requirement leads to a customized polygon-like Fresnel zone. The simplest one is a square zone with a pattern of phases repeating each five zones. On the other hand, an alternative SFZP can be designed guided by the same criterion but with a new restriction. In this case, the distance between the borders of different zones remains unaltered. A comparison between the two lenses is carried out. The irradiance at focus is computed for both and suitable merit figures are defined to account for the difference between them.


Item Type:Book Section
Additional Information:

Copyright 2009. Society of Photo Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
ISSN: 0277-786X
Conference on Modeling Aspects in Optical Metrology II, Munich, GERMANY, JUN 15-16, 2009

Uncontrolled Keywords:Lenses ; Optics ; SFZP ; Square Fresnel zone plates ; nanoptics ; optical wavelengths
Subjects:Sciences > Physics > Optics
Medical sciences > Optics > Optical materials
Medical sciences > Optics > Physical optics
ID Code:38630
Deposited On:08 Sep 2016 10:13
Last Modified:08 Sep 2016 10:13

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