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A broadband zone plate lens from transformation optics
Rui Yang1, Wenxuan Tang, Yang Hao
1School of Electronic Engineering and Computer Science, Queen Mary, University of London, London E1 4NS, UK.
Optics Express
|July 1, 2011
Summary
This study introduces a novel refractive zone plate lens for broadband applications. This all-dielectric lens offers a superior alternative to narrow-band diffractive elements.
Area of Science:
- Optics and Photonics
- Materials Science
Background:
- Diffractive optical elements like Fresnel lenses suffer from narrow bandwidth.
- Refractive lenses offer broadband potential but are typically bulky.
Purpose of the Study:
- To develop a broadband, flat optical lens using a refractive approach.
- To overcome the inherent bandwidth limitations of diffractive lenses.
Main Methods:
- Utilizing transformation optics to design a flat hyperbolic lens.
- Compressing the lens into a compact form using all-dielectric zone plates.
Main Results:
- The proposed zone plate lens demonstrates broadband operation.
- The all-dielectric design maintains the broadband performance of the original hyperbolic lens.
- The flat lens is a viable alternative to traditional diffractive elements.
Conclusions:
- A novel refractive zone plate lens enables broadband light manipulation.
- This compact, all-dielectric design offers significant advantages over narrow-band diffractive lenses for various optical applications.
