Optical phased array using high contrast gratings for two dimensional beamforming and beamsteering Yoo, Byung-Wook ; Megens, Mischa ; Chan, Trevor ; Sun, Tianbo ; Yang, Weijian ; Chang-Hasnain, Connie J. ; Horsley, David A. ; Wu, Ming C. Abstract Publication: Optics Express Pub Date: May 2013 DOI: 10.1364/OE.21.012238 Bibcode: 2013OExpr..2112238Y