Combining broadband achromatic focusing with a wide field of view is a long-standing challenge for metalenses. Starting from a quadratic phase profile and applying dispersion engineering with waveguide-like rectangular meta-atoms in a single silicon layer, we demonstrate an 86° field of view and a tenfold reduction of the focal-length variation over the 1.5–1.6 µm range compared with a conventional quadratic metalens, while keeping the focusing efficiency constant.
Read the paper: Scientific Reports 15, 43343 (2025), doi: 10.1038/s41598-025-27208-1
Figure reproduced from J. Cao et al., Scientific Reports 15, 43343 (2025), under a CC BY 4.0 license.