An Example of a Metasurface (IMAGE) Moscow Institute of Physics and Technology Caption This is an example of a metasurface, which can create negative refraction. Credit Source Image: Birck Nanotechnology Center, Purdue University Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.