Fig. 5: Experimental characterization of fabricated metalenses. | Light: Science & Applications

Fig. 5: Experimental characterization of fabricated metalenses.

From: High-efficiency, large-area, topology-optimized metasurfaces

Fig. 5

a Scanning electron micrographs of the metalenses with tilted and top-down views. b Relative and absolute efficiencies of the fabricated metalenses, along with their simulated values. ce Intensity line scans at the focal planes of the metalenses with NAs of 0.2, 0.5, and 0.8, respectively, along with comparisons with the simulated lenses. fh Efficiencies of the fabricated metalenses as a function of the wavelength, along with their simulated values. These metalenses have the same design but were fabricated on a different sample than those that were measured in (ae)

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