Inverse designed extended depth of focus meta-optics for broadband imaging in the visible-Reference-Cited by-同舟云学术

Inverse designed extended depth of focus meta-optics for broadband imaging in the visible

Published:2021-09-24 Issue:0 Volume:0 Page:
ISSN:2192-8614
Container-title:Nanophotonics
language:en
Short-container-title:

Author:

Bayati Elyas¹,Pestourie Raphaël²,Colburn Shane¹,Lin Zin²^ORCID,Johnson Steven G.²,Majumdar Arka¹³^ORCID

Affiliation:

1. Department of Electrical and Computer Engineering , University of Washington , Seattle , WA 98195 , USA

2. Department of Mathematics , MIT , Cambridge , MA 02139 , USA

3. Department of Physics , University of Washington , Seattle , WA 98189 , USA

Abstract

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.

Publisher

Walter de Gruyter GmbH

Subject

Electrical and Electronic Engineering,Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials,Biotechnology

Link

https://www.degruyter.com/document/doi/10.1515/nanoph-2021-0431/pdf

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