Waveplate (IMAGE) Penn State Caption Schematic of the tantalum pentoxide waveplate material showing the sandwiches created from 2 layers of upright nanorods sandwiching a layer of slanted nanorods. Credit Akhlesh Lakhtakia, Penn State Usage Restrictions non commercial use only 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.