Colorplot (image) University of Illinois College of Engineering Share Print E-Mail Caption This image shows the relationship between energy and momentum for the excitonic collective mode observed with M-EELS. Credit Image courtesy of Peter Abbamonte, U. of I. Department of Physics and Frederick Seitz Materials Research Laboratory 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.