High quality factor metasurfaces for two-dimensional wavefront manipulation

Claudio U. Hail, Morgan Foley, Ruzan Sokhoyan, Lior Michaeli and Harry A. Atwater ()
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Claudio U. Hail: California Institute of Technology
Morgan Foley: California Institute of Technology
Ruzan Sokhoyan: California Institute of Technology
Lior Michaeli: California Institute of Technology
Harry A. Atwater: California Institute of Technology

Nature Communications, 2023, vol. 14, issue 1, 1-8

Abstract: Abstract The strong interaction of light with micro- and nanostructures plays a critical role in optical sensing, nonlinear optics, active optical devices, and quantum optics. However, for wavefront shaping, the required local control over light at a subwavelength scale limits this interaction, typically leading to low-quality-factor optical devices. Here, we demonstrate an avenue towards high-quality-factor wavefront shaping in two spatial dimensions based on all-dielectric higher-order Mie-resonant metasurfaces. We design and experimentally realize transmissive band stop filters, beam deflectors and high numerical aperture radial lenses with measured quality factors in the range of 202–1475 at near-infrared wavelengths. The excited optical mode and resulting wavefront control are both local, allowing versatile operation with finite apertures and oblique illumination. Our results represent an improvement in quality factor by nearly two orders of magnitude over previous localized mode designs, and provide a design approach for a new class of compact optical devices.

Date: 2023
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DOI: 10.1038/s41467-023-44164-4

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