3-D Nanoscale Optical Cavities (image) DOE/Lawrence Berkeley National Laboratory Caption This is an electron micrograph showing arrays of indefinite optical cavities comprised of silver/germanium multilayers. Credit Courtesy of Xiang Zhang group Usage Restrictions courtesy of Xiang Zhang, et. al 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.