Journal
OPTICS EXPRESS
Volume 29, Issue 9, Pages 13542-13551Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.422126
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Funding
- Natural Science Foundation of Sichuan Province [2019YJ0172]
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In this study, a double-layer metalens was designed to achieve achromatic imaging over a field of view (FOV) of 60 degrees in the visible light range of 470 nm to 650 nm, with the additional advantage of polarization insensitivity.
Optical metalens has been attracting more and more attention in recent years. To date, it is still difficult to simultaneously achieve wide field and broadband imaging in the visible region, which is very important in many applications, such as cameras, microscopy, and other imaging devices. In this paper, we design a double-layer metalens to achieve achromatic imaging over a field of view (FOV) of 60 degrees in the visible light range of 470 nm to 650 nm, and its performance is verified by numerical simulations. The numerical aperture (NA) of the metalens is 0.61 and the average focusing efficiency is > 50% at normal incidence. The metalens has an additional advantage of polarization insensitivity. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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