Journal
OPTICS EXPRESS
Volume 23, Issue 15, Pages 19846-19853Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.23.019846
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Funding
- Ministerio de Economia y Competividad [FIS2011-23175]
- Generalitat Valenciana, Spain [PROMETEOII/2014/072]
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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. (C) 2015 Optical Society of America
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