Bifractal focusing and imaging properties of Thue-Morse Zone Plates

We present a new family of Zone Plates (ZPs) designed using the Thue-Morse sequence. The focusing and imaging properties of these aperiodic diffractive lenses coined Thue-Morse Zone Plates (TMZPs) are examined. It is demonstrated that TMZPs produce a pair of self-similar and equally intense foci alo...

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Bibliographic Details
Published in:Optics express 2015-07, Vol.23 (15), p.19846-19853
Main Authors: Ferrando, Vicente, Giménez, Fernando, Furlan, Walter D, Monsoriu, Juan A
Format: Article
Language:English
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Summary:We present a new family of Zone Plates (ZPs) designed using the Thue-Morse sequence. The focusing and imaging properties of these aperiodic diffractive lenses coined Thue-Morse Zone Plates (TMZPs) are examined. It is demonstrated that TMZPs produce a pair of self-similar and equally intense foci along the optical axis. As a consequence of this property, under broadband illumination, a TMZP produces two foci with an extended depth of focus and a strong reduction of the chromatic aberration compared with conventional periodic ZPs. This distinctive optical characteristic is experimentally confirmed.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.23.019846