2-D LED (image) University of Washington Share Print E-Mail Caption This graphical representation shows the layers of the 2-D LED and how it emits light. Credit U of Washington Usage Restrictions Photo credit required. Share Print E-Mail 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.