Fig. 4From: Realization of high aspect ratio metalenses by facile nanoimprint lithography using water-soluble stampsOptical characterization. a-c Measured normalized intensity distributions of the focal planes at (a) 450Â nm, (b) 532Â nm, and (c) 635Â nm. d-f Focusing intensity distribution with ideal Airy disks at (d) 450Â nm, (e) 532Â nm, and (f) 635Â nmBack to article page