Artist's Impression of the Bragg Gated Structure on a Silicon Substrate (image) University of Sydney Share Print E-Mail Caption Artist's impression of the Bragg gated structure on a silicon substrate. Credit University of Sydney & SIngapore University of Technology and Design Usage Restrictions for this story only. 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.