Waveguide Schematic (IMAGE) Duke University Caption This is a schematic of the new optical waveguide device showing the input and output gratings and silicon waveguide connections. Credit Natasha Litchinitser, Duke University 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.