Single-layer silicon metalens for broadband achromatic focusing and wide field of view.

ABSTRACT: Achieving simultaneous broadband achromatic focusing and a wide field of view remains a significant challenge for metalenses. In this work, we begin with a quadratic phase profile, enabling full field-of-view designs, and apply dispersion engineering to minimize variations of the focal length across wavelengths, thereby substantially reducing both longitudinal and transverse chromatic aberrations. This is accomplished using only the propagation phase in a single layer of waveguide-like rectangular meta-atoms, without relying on geometric phase contributions. The fabricated metalens experimentally demonstrates a field of view of [Formula: see text], along with a tenfold reduction in focal length variations with wavelength compared to a conventional quadratic metalens, achieving a measured r

SUBMITTER: Cao J 

PROVIDER: S-EPMC12686017 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature