Quantum Device (IMAGE) Princeton University Caption Photoluminescence with above-bandgap excitation in layered diamond. Credit Image courtesy of Nathalie de Leon, Princeton University Usage Restrictions Image courtesy of Nathalie de Leon, Princeton University 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.