Beating spectral bandwidth limits for large aperture broadband nano-optics

Johannes E. Fröch (), Praneeth Chakravarthula, Jipeng Sun, Ethan Tseng, Shane Colburn, Alan Zhan, Forrest Miller, Anna Wirth-Singh, Quentin A. A. Tanguy, Zheyi Han, Karl F. Böhringer, Felix Heide and Arka Majumdar ()
Additional contact information
Johannes E. Fröch: University of Washington
Praneeth Chakravarthula: University of North Carolina at Chapel Hill
Jipeng Sun: Princeton University
Ethan Tseng: Princeton University
Shane Colburn: University of Washington
Alan Zhan: Fluke Hall
Forrest Miller: University of Washington
Anna Wirth-Singh: University of Washington
Quentin A. A. Tanguy: University of Washington
Zheyi Han: University of Washington
Karl F. Böhringer: University of Washington
Felix Heide: Princeton University
Arka Majumdar: University of Washington

Nature Communications, 2025, vol. 16, issue 1, 1-10

Abstract: Abstract Flat optics have been proposed as an attractive approach for the implementation of new imaging and sensing modalities to replace and augment refractive optics. However, chromatic aberrations impose fundamental limitations on diffractive flat optics. As such, true broadband high-quality imaging has thus far been out of reach for fast f-numbers, large aperture, flat optics. In this work, we overcome intrinsic spectral bandwidth limitations, achieving broadband imaging in the visible wavelength range with a flat meta-optic, co-designed with computational reconstruction. We derive the necessary conditions for a broadband, 1 cm aperture, f/2 flat optic, with a diagonal field of view of 30° and average system MTF contrast of 20% or larger for a spatial frequency of 100 lp/mm in the visible band (>30% for

Date: 2025
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DOI: 10.1038/s41467-025-58208-4

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