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Fig. 9 | Nano Convergence

Fig. 9

From: Plasmonic- and dielectric-based structural coloring: from fundamentals to practical applications

Fig. 9

a (Left) schematic diagram of plasmonic cell consisting of Mg NPs. White unpolarized light incident on the plasmonic cell in normal direction. H2 exposure erases the color; O2 restores it. (Right) color palettes as a function of d and ln(t). b (Left) Time-varying color erasing and restoring of fabricated image. (Right) SEM image of the fabricated sample [131]. c (Top) Schematic diagram of proposed dynamic stepwise cavity resonators. Upon H2 exposure, color information is shown; O2 exposure erases the color; H2 restores it. (Bottom) cross section view of unit Fabry-Pérot resonator. Under H2, a double dielectric spacer is formed and the TiH2/PdH layer transmits incident light. d (Top) Vincent van Gogh’s Starry Night and fabricated SEM image. (Bottom) color erasing and restoring processes as a function of H2 and O2 exposure time [132]

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