A Photonic Integrated Circuit (image) American Institute of Physics Share Print E-Mail Caption A photonic integrated circuit in which an ultralow loss 2-meter optical waveguide guiding visible light in the red spectrum is put on a silicon nitride chip smaller than a penny, important for applications such as strontium atomic clocks. Credit Nitesh Chauhan and the DARPA MTO ApHI program Usage Restrictions Journalists may use this image only with appropriate credit. Share Print E-Mail 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.