Photon Roundabout (IMAGE) Institute of Science and Technology Austria Caption The new nonreciprocal device acts as a roundabout for photons. Here, arrows show the direction of photons propagation. Credit IST Austria/ Birgit Rieger Usage Restrictions withcredit 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.