Fig. 5
From: Plasmonic- and dielectric-based structural coloring: from fundamentals to practical applications
a Schematic configuration of nanodisk fabricated on Si3N4, with optical micrographs of Si, Al and Ag. b Optical micrographs of a color filter using Si-based nanodisks (diameters 35–250 nm in increments of 5 nm; gaps between nanodisks are 60–430 nm in increments of 10 nm). c SEM images of dot array with a pitch of 250 nm, and dose of (i) 200 µC/cm2 and (ii) 800 µC/cm2. Square color images (7.5 × 7.5 mm) tilted at (iii) 15° and (iv) 40°. d (i) A original painting (The scream by Edvard Munch); (ii) the painting after discretization of the colors generated in (i) of b. (iii) Optical micrograph reproduced by the color filter based on Si nanodisk (545 × 700 µm). e Photograph of reproduced paintings on a quartz wafer with a pencil for scale [112]