High efficiency multilevel phase-type fractal zone plates
Optics Letters, Vol. 33, Issue 24, pp. 2913-2915 (2008)
http://dx.doi.org/10.1364/OL.33.002913
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Abstract
Three kinds of high efficiency phase-type fractal zone plates were rapidly (in tens of minutes) fabricated by femtosecond laser two-photon photopolymerization. Their theoretical maximal diffractive efficiencies of 24.5%, 12.52%, and 18.76% were predicted both by numerical simulation and analytical deduction and were verified by the measured values of 20.5%, 9.1%, and 13%, respectively. The characteristic of multifoci and the improved imaging ability for phase-type fractal lens was also demonstrated. Moreover, to further enhance the diffractive efficiency, a four-level fractal phase lens, whose diffraction efficiency reached as high as 37.6%, was proposed and realized.
© 2008 Optical Society of America
OCIS Codes
(050.1380) Diffraction and gratings : Binary optics
(130.1750) Integrated optics : Components
(130.3120) Integrated optics : Integrated optics devices
(140.3390) Lasers and laser optics : Laser materials processing
(220.4241) Optical design and fabrication : Nanostructure fabrication
(050.6875) Diffraction and gratings : Three-dimensional fabrication
ToC Category:
Diffraction and Gratings
History
Original Manuscript: September 8, 2008
Revised Manuscript: October 29, 2008
Manuscript Accepted: October 29, 2008
Published: December 4, 2008
Citation
Dong Wu, Li-Gang Niu, Qi-Dai Chen, Rui Wang, and Hong-Bo Sun, "High efficiency multilevel phase-type fractal zone plates," Opt. Lett. 33, 2913-2915 (2008)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-33-24-2913
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