Media 2: Unidirectional complex gratings assisted couplers Maxim Greenberg Meir Orenstein 10.1364/OPEX.12.004013.m002 https://opticapublishing.figshare.com/articles/media/Media_2_Unidirectional_complex_gratings_assisted_couplers/4931654 Originally published in Optics Express on 23 August 2004 (oe-12-17-4013) 2004-08-23 00:00:00 media oe Optics Express 23 August 2004 coupler Unidirectional grating