Photodetector (image) Vienna University of Technology Caption This is the schematic of the detector. The metamaterial couples the incident light to the semiconductor, and then it can be converted into an electric signal. Credit Vienna University of Technology Usage Restrictions None 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.