Spectral cloaking could make objects invisible under realistic conditions: New approach to invisibility cloaking could be used to secure data transmissions and advance sensing, telecommunications and other applications
https://www.sciencedaily.com/releases/2018/06/180628120102.htm
Researchers and engineers have long sought ways to conceal objects by manipulating how light interacts with them. A new study offers the first demonstration of invisibility cloaking based on the manipulation of the frequency (color) of light waves as they pass through an object, a fundamentally new approach that overcomes critical shortcomings of existing cloaking technologies.