Four Prototype Metalenses (IMAGE) University of Washington Caption Four ultrathin metalenses developed by University of Washington researchers and visualized under a microscope. Credit Liu et al., <em>Nano Letters</em>, 2018 Usage Restrictions Must include credit 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.