Metamaterial (IMAGE) Duke University Caption This is an illustration of one of cells that make up the metamaterial structure. The yellow lines are copper. Credit Wenchen Chen and Willie Padilla, Boston College. 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.