Semiconductor Quantum Rings (IMAGE) DOE/Argonne National Laboratory Caption This is an artistic rendering of semiconductor quantum rings being illuminated by a laser and emitting single photons. Credit Argonne National Laboratory 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.