Carlo G. Pantano, Penn State (IMAGE) Penn State Caption Carlo G. Pantano, distinguished professor of materials science and engineering, and director, Penn State's Materials Research Institute holds conventional doubly refracting glass which requires 15 or more alternating layers of two materials with precisely controlled thicknesses. The CEFR technique yields doubly refracting characteristics through deposition of only one coating, nanostructured by the biotemplate. He stands before equipment used for this technique. Credit Greg Grieco, Penn State Usage Restrictions For 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.