Journal
LIGHT-SCIENCE & APPLICATIONS
Volume 11, Issue 1, Pages -Publisher
SPRINGERNATURE
DOI: 10.1038/s41377-022-01024-y
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Funding
- National Key R&D Program of China [2022YFA1404300, 2017YFA0303701]
- National Natural Science Foundation of China [91850204, 12174186, 62288101]
- Dengfeng Project B of Nanjing University
- Guangdong Provincial Innovation and Entrepreneurship Project [2017ZT07C071]
- Natural Science Foundation of Shenzhen Innovation Commission [JCYJ20200109140808088]
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This article presents a new framework for designing multi-level diffractive lenses with achromatic capabilities under non-ideal conditions. Polymer lenses with diameters ranging from 1 to 10 mm were successfully designed and fabricated. Optical characterizations showed that these achromatic lenses have a super broad bandwidth and significant advantages in white-light imaging performance.
Flat lenses, including metalens and diffractive lens, have attracted increasing attention due to their ability to miniaturize the imaging devices. However, realizing a large scale achromatic flat lens with high performance still remains a big challenge. Here, we developed a new framework in designing achromatic multi-level diffractive lenses by light coherence optimization, which enables the implementation of large-scale flat lenses under non-ideal conditions. As results, a series achromatic polymer lenses with diameter from 1 to 10 mm are successfully designed and fabricated. The subsequent optical characterizations substantially validate our theoretical framework and show relatively good performance of the centimeter-scale achromatic multi-level diffractive lenses with a super broad bandwidth in optical wavelengths (400-1100 nm). After comparing with conventional refractive lens, this achromatic lens shows significant advantages in white-light imaging performance, implying a new strategy in developing practical planar optical devices.
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