Color and Metasurfaces

 


Roy Lichtenstein once said, "Color is crucial." Color's significance extends far beyond art. Color and its creation have always mirrored technological progress. Two current examples of this are Prussian blue (the first synthetic pigment) and quantum dots in modern display technology.

Scientists at ETH Zurich's Laboratory for Nanometallurgy have created a new method of making non-primitive metasurfaces. The colors of these metasurfaces represent light-matter interactions. The research was presented in the journal Advanced Optical Materials.

To show what these metasurfaces can do, researchers got creative. They have recreated Lichtenstein's iconic "Sinking Sun" in nanoscale!

This reproduction work shows how color (or specific resonant states) can be fabricated through meticulous control of materials and geometry. Because of this control, these metasurfaces are perfectly suited for encoding information in ways that remain imperceptible. 

These metasurfaces could someday be a deterrent against counterfeiting.

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