Fig. 4
From: Ultracompact multifunctional metalens visor for augmented reality displays
Focal spots of the fabricated metalens with NA = 0.035 at RGB illumination and comparison with simulation results. (a to c) Measured focal spot intensity profile at the illumination wavelengths of (a) 633 nm, (b) 532 nm and (c) 457 nm. (d to f) Corresponding normalized intensity profiles along the white dashed lines in (a to c) respectively and comparison with simulation results based on Rayleigh-Sommerfeld diffraction. FWHMs of both the experimental and simulated results are labeled in the legends