Silicon chip with a tiled array (IMAGE) University of Colorado at Boulder Caption A silicon chip with a tiled array of serpentine optical phased array (SOPA) tiles. The 32 tiles in the 8-by-4 array have slightly differing grating designs, showing here two matching pairs of tiles "lighting up" at this viewing angle. Drawn superimposed are beams from two matching tiles and the far field beam interference pattern demonstrating tiled beam forming. Credit Bohan Zhang and Nathan Dostart Usage Restrictions None 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.