Metamaterial Prototypes (IMAGE) Northwestern University Caption Several metamaterial prototypes at different scales, which were miniaturized at the micron scale using two-photon direct laser writing. Credit Allison L. Carter, Georgia Tech 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.