Fig. 12
From: Plasmonic- and dielectric-based structural coloring: from fundamentals to practical applications
a (i) Schematic flows of fabrication steps to produce disk, Al dome-ring and ring structures. (ii) SEM images of structures and corresponding color responses [148]. b Schematic design of a network metamaterials based on PtYAl and Al2O3 layer. c, d Working principles and calculated energy distributions of network metamaterials without c and with d Al2O3 layer. (i) Schematic diagram of interactions between light and matter. (ii) Energy distributions in fabricated structures at λ = 425 nm. (iii) Magnified images of (ii) illustrating electromagnetic energy flow indicated by arrows. e Photograph of a graphic design based on the network metamaterials. Inset: optical microscopic image showing two uniform colors [149]