Diffraction Grating (IMAGE) ETH Zurich Caption Diffraction grating produced with a hot scanning probe. The red line shows the surface profile of the grating. Credit ETH Zurich / Nolan Lassaline 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.