Thin-film Pancharatnam lens with low f-number and high quality | Zendy

Kun Gao | Zendy; HsienHui Cheng | Zendy; Achintya K. Bhowmik | Zendy; Philip J. Bos | Zendy

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Thin-film Pancharatnam lens with low f-number and high quality

Author(s) -

Kun Gao,

HsienHui Cheng,

Achintya K. Bhowmik,

Philip J. Bos

Publication year - 2015

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.23.026086

Subject(s) - optics , holography , lens (geology) , fabrication , polarization (electrochemistry) , materials science , bandwidth (computing) , refractive index , focal length , optoelectronics , physics , computer science , telecommunications , chemistry , medicine , alternative medicine , pathology

We have made an ultra-thin (~2.26 µm) f/2.1 lens based on the Pancharatnam phase effect using the polarization holography alignment technique. This lens exhibits a continuous phase profile, high efficiency (>97%), and is switchable from having a positive focal length to a negative one by changing the handedness of input circularly polarized light. We analyzed its optical performance and simulated it as a gradient index lens for further comparison, and to discuss its bandwidth limitation. The conditions required for improving the performance and its low-cost fabrication method is discussed. Because of the nature of Pancharatnam devices and the demonstrated fabrication method, these results are applicable to a wide size range.

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