OpSIS Graphic (IMAGE) University of Washington Caption This is a graphic of a recently built silicon photonic chip measuring 1 cm by 2 cm. At the bottom is a photograph of the chip. Above it, in green, is the original chip design. The rectangle on the upper left shows how layers of silicon (blue), metal (gray) and electrical insulator (orange) combine to create channels, or waveguides, for light to pass through. Credit A. Spott, University of Washington Usage Restrictions For news media 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.