Dirac Cone (IMAGE) University of California - Berkeley Caption Schematic showing the “Dirac cones.” Light is emitted synchronously from the entire semiconductor cavity as a result of the Dirac point singularity. Credit Image courtesy of the Boubacar Kanté group Usage Restrictions with credit License Original 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.