Optical Resonators on a Chip (IMAGE) Ecole Polytechnique Fédérale de Lausanne Caption These are optical micro resonators made from silicon nitride on a chip using for soliton based communications. Credit © V. Brasch (LPQM, EPFL) 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.