Guidewave (IMAGE) Penn State Caption Rod shaped waveguide with two quasi-two dimensional conformal coatings that sheild the waveguide from crosstalk and blocking and allow the waveguide to be smaller. Credit Werner Lab, Penn State Usage Restrictions non commercial use only License Licensed 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.