Phonon Laser (IMAGE) Washington University in St. Louis Caption A phonon laser formed by coupled optical resonators. Mechanical vibrations in resonator (blue) could be enhanced when the frequency difference of two optical supermodes matches with the frequency mechanical vibrations. Credit Micro/Nano Photonics Lab 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.