Song, JeonghwanJeonghwanSongRottenberg, XavierXavierRottenberg2021-10-242021-10-2420171041-1135https://imec-publications.be/handle/20.500.12860/29474Low-back-reflection grating couplers using asymmetric grating trenchesJournal articlehttp://ieeexplore.ieee.org/document/7811282/