Image of Device (image) University of Minnesota Share Print E-Mail Caption This image shows a false-colored electron microscope image of the University of Minnesota device. The blue area marks the topological insulator on top of the optical waveguide in red. Credit Credit: University of Minnesota Usage Restrictions Please credit the University of Minnesota. 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.