Researchers in Japan have demonstrated a range of highly tunable vivid color pixels controlled by the geometry of a monocrystalline silicon metamaterial surface. The pixels created showed dual-color response dependent on the polarization of the light source, as well as subwavelength resolution. These materials have potential applications in high-resolution printing, particularly for anti-counterfeiting technology. They could also be used for optical data storage and three-dimensional displays.
from Engineering and Construction News – ScienceDaily https://www.sciencedaily.com/releases/2018/01/180125101306.htm
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