Metagrating solutions for full color single-plate waveguide combiner Oksana Shramkova, Valter Drazic, Guillaume Bourcin, Bobin Varghese, Laurent Blondé and Valérie Allié EPJ Appl. Metamat., 9 (2022) 5 Published online: 17 February 2022 DOI: 10.1051/epjam/2022003