Fig. 3

a Schematic illustration of nanorod-based color printing device. Wavelength of reflected light is changed by varying diameter D and separations g of nanodisks. b Microscopic images of Lena (i) before and (ii) after deposition of a metallic capping layer. c Schematics of floating dipoles of plasmonic pixels producing (i) subtractive colors and (ii) black. d (i) Test pattern to observe variations of brightness and saturation via control of plasmonic pixels. (ii) ×5 magnified image of manufactured pattern of test structures, showing arrangement of the plasmonic pixels. (iii) Defocused magnified image of test pattern indicating gradual variations of brightness and saturation. e (i) Original photograph of Vincent Lingiari and Gough Whilam in 1975 by Mervyn Bishop. Reproduced images polarized along (ii) x axis and (iii) y axis