IQUIST_metamaterial.jpg (image) University of Illinois Grainger College of Engineering Share Print E-Mail Caption Photo of a metamaterial composed of a pattern of resonators. The defect appears as a pentagon in an otherwise regular array of circuit elements. Credit Kitt Peterson Usage Restrictions None Share Print E-Mail 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.