A close-up of the single photon emitter (IMAGE) KTH, Royal Institute of Technology Caption A closer look at the single photon emitter designed by researchers in Sweden. Credit Ali Elshaair 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.