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. 2022 May 3;13:2409. doi: 10.1038/s41467-022-29973-3

Fig. 5. 1-cm-diameter RGB-achromatic polarization-insensitive metalens (NA = 0.3).

Fig. 5

a Photograph of the fabricated 1-cm-diameter metalens. The scale bar is 1 cm. The inset is the SEM image of the nanostructures used in the metalens. The scale bar is 500 nm. b Simulations of focal intensity distribution along the optical axis at RGB design wavelengths. The inset is the zoomed-in view of the peaks. c Measured focal intensity distribution in the XZ plane at RGB wavelengths. d–f Measured normalized focal intensity distribution at the focal planes of λ = 488, 532, and 658 nm, respectively. g–i Imaging results of the group #7 of the USAF resolution target under blue, green, and red-light illumination. The scale bars are 30 µm.