Computational inverse design for ultra-compact single-piece metalenses free of chromatic and angular aberration
Name
2011.10467.pdf
Description
Submitted version
Size
5.97 MB
Format
Adobe PDF
Checksum (MD5)
35d5e493a495e056ab637955d89bc4f7
Author(s)
Lin, Zin
Roques-Carmes, Charles
Christiansen, Rasmus E
Soljačić, Marin
Johnson, Steven G
Date Issued
2021
Journal
Applied Physics Letters
Publisher
AIP Publishing
Version
Original manuscript
Abstract
© 2021 Author(s). We present full-Maxwell topology-optimization design of a single-piece multilayer metalens, about 10 wavelengths λ in thickness, which simultaneously focuses over a 60° angular range and a 23% spectral bandwidth without suffering chromatic or angular aberration, a "plan-achromat."At all angles and frequencies, it achieves diffraction-limited focusing (Strehl ratio >0.8) and an absolute focusing efficiency of >50%. Both 2D and 3D axisymmetric designs are presented, optimized over ∼ 10 5 degrees of freedom. We also demonstrate shortening the lens-to-sensor distance while producing the same image as for a longer "virtual"focal length and maintaining plan-achromaticity. These proof-of-concept designs demonstrate the ultra-compact multifunctionality that can be achieved by exploiting the full wave physics of subwavelength designs and motivate future work on design and fabrication of multilayer metaoptics.
MIT Department
Massachusetts Institute of Technology. Department of Mathematics
Massachusetts Institute of Technology. Research Laboratory of Electronics
Massachusetts Institute of Technology. Department of Physics
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Creative Commons Attribution-Noncommercial-Share Alike
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DOI of Published Version
https://doi.org/10.1063/5.0035419
