Open AccessA broadband zone plate lens from transformation optics
Author(s) -
Rui Yang,
Wenxuan Tang,
Yang Hao
Publication year - 2011
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.012348
Subject(s) - optics , lens (geology) , broadband , fresnel lens , zone plate , fresnel zone , transformation optics , simple lens , fresnel zone antenna , diffraction efficiency , diffraction , fresnel diffraction , fresnel equations , materials science , refractive index , physics , focal length , metamaterial , telecommunications , computer science , directional antenna , antenna (radio) , smart antenna
A zone plate lens utilizing a refractive instead of diffractive approach is presented for broadband operation. By utilizing transformation optics, we compress the conventional hyperbolic lens into a flat one with a few zone plates made of all-dielectric materials. Such a transformed lens maintains the broadband performance of the original lens, thus providing a superior alternative to the diffractive Fresnel element which is inherently narrow band.