10:45 AM - 11:00 AM [19a-225B-7] Optimization of Doubly-Periodic Photonic Crystal Waveguide for Improving the Reception Efficiency in Si Photonics Slow-Light LiDAR 〇Goro Takeuchi1, Hiroshi Abe1, Toshihiko Baba1 (1.Yokohama Nat'l Univ.)