Photonic Crystal (image) Massachusetts Institute of Technology, Institute for Soldier Nanotechnologies Share Print E-Mail Caption This is a zoomed-in picture of the photonic crystal built by Lu et al. with a penny sitting on top for scale. Credit Dr. Ling Lu Usage Restrictions None 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.