Reconfigurable all-dielectric metalens with diffraction-limited performance
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s41467-021-21440-9.pdf
Description
Published version
Size
3.19 MB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Shalaginov, Mikhail Y
An, Sensong
Zhang, Yifei
Yang, Fan
Su, Peter
Liberman, Vladimir
Chou, Jeffrey B
Roberts, Christopher M
Kang, Myungkoo
Rios, Carlos
Date Issued
2021
Journal
Nature Communications
Publisher
Springer Science and Business Media LLC
Citation
Shalaginov, Mikhail Y, An, Sensong, Zhang, Yifei, Yang, Fan, Su, Peter et al. 2021. "Reconfigurable all-dielectric metalens with diffraction-limited performance." Nature Communications, 12 (1).
Version
Final published version
Abstract
© 2021, The Author(s). Active metasurfaces, whose optical properties can be modulated post-fabrication, have emerged as an intensively explored field in recent years. The efforts to date, however, still face major performance limitations in tuning range, optical quality, and efficiency, especially for non-mechanical actuation mechanisms. In this paper, we introduce an active metasurface platform combining phase tuning in the full 2π range and diffraction-limited performance using an all-dielectric, low-loss architecture based on optical phase change materials (O-PCMs). We present a generic design principle enabling binary switching of metasurfaces between arbitrary phase profiles and propose a new figure-of-merit (FOM) tailored for reconfigurable meta-optics. We implement the approach to realize a high-performance varifocal metalens operating at 5.2 μm wavelength. The reconfigurable metalens features a record large switching contrast ratio of 29.5 dB. We further validate aberration-free and multi-depth imaging using the metalens, which represents a key experimental demonstration of a non-mechanical tunable metalens with diffraction-limited performance.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Lincoln Laboratory
MIT Materials Research Laboratory
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Creative Commons Attribution 4.0 International License
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DOI of Published Version
https://doi.org/10.1038/S41467-021-21440-9
