@inproceedings{CTT100734637, author = {Kazuto Itou and Yuusuke Hayashi and Yusuke Hayashi and Junichi Suzuki and Tomohiro Amemiya and Nobuhiko Nishiyama and Shigehisa Arai}, title = {Interlayer Transition Couplers for 3D Optical Circuit}, booktitle = {}, year = 2016, }