10.1364/OPEX.12.004013.m002 Maxim Greenberg Maxim Greenberg Meir Orenstein Meir Orenstein Media 2: Unidirectional complex gratings assisted couplers Optica Publishing Group 2004 media oe Optics Express 23 August 2004 coupler Unidirectional grating 2004-08-23 00:00:00 Media 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)