Inkless Printing Manipulates Light at the Nanoscale to Produce Colors

Using nanometer-size metamaterials, researchers at Missouri University of Science and Technology have developed a technique to print images that uses the manipulation of light, rather than the application of ink, to produce colors.

In the technique developed by Missouri S&T, instead of ink, microminiature perforations are made in a multi-layered structure consisting of two thin films of silver separated by a film of silica 45 nanometers thick….