Beating bandwidth limits for large aperture broadband nano-optics

• DOI: 10.48550/arxiv.2402.06824
• Publication Date: 2024-02-09
• Authors: Johannes E. Fröch; Praneeth Chakrava...; Jipeng Sun; Ethan Tseng; Shane Colburn; Alan Zhan; Forrest Miller; Anna Wirth-Singh; Quentin A. A. Tanguy; Zheyi Han; K. F. Böhringer; Felix Heide; Arka Majumdar
• Keywords: Aperture (computer memory)

Flat optics have been proposed as an attractive approach for the implementation of new imaging and sensing modalities to replace augment refractive optics. However, chromatic aberrations impose fundamental limitations on diffractive flat As such, true broadband high-quality has thus far out reach low f-number, large aperture, In this work, we overcome these intrinsic limitations, achieving in visible wavelength range with a meta-optic, co-designed computational reconstruction. We derive necessary conditions broadband, 1 cm f/2 optic, diagonal field view 30{\deg} average system MTF contrast 30% or larger spatial frequency 100 lp/mm band (> 50 % 70 below). Finally, use coaxial, dual-aperture train meta-optic learned reconstruction method operating pair-wise captured data. Fundamentally, our work challenges entrenched belief inability capturing high-quality, full-color images using single aperture meta-optic.