Inverse designed extended depth of focus meta-optics for broadband imaging in the visible
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2105.00160 (2).pdf
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Author(s)
Bayati, Elyas
Pestourie, Raphael
Colburn, Shane
Lin, Zin
Johnson, Steven G
Majumdar, Arka
Date Issued
September 2021
Journal
Nanophotonics
Publisher
Walter de Gruyter GmbH
Citation
Bayati, Elyas et al. "Inverse designed extended depth of focus meta-optics for broadband imaging in the visible" Forthcoming in Nanophotonics.
Version
Final published version
Abstract
We report an inverse-designed, high numerical aperture (∼0.44), extended depth of focus (EDOF) meta-optic, which exhibits a lens-like point spread function (PSF). The EDOF meta-optic maintains a focusing efficiency comparable to that of a hyperboloid metalens throughout its depth of focus. Exploiting the extended depth of focus and computational post processing, we demonstrate broadband imaging across the full visible spectrum using a 1 mm, f/1 meta-optic. Unlike other canonical EDOF meta-optics, characterized by phase masks such as a log-asphere or cubic function, our design exhibits a highly invariant PSF across ∼290 nm optical bandwidth, which leads to significantly improved image quality, as quantified by structural similarity metrics.
MIT Department
Massachusetts Institute of Technology. Department of Mathematics
Terms of Use
Creative Commons Attribution 4.0 International license
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1515/nanoph-2021-0431
