[15p-K505-9~18] CS.2 Code-sharing Session of 3.10 & 3.13

5:45 PM - 6:00 PM JST(8:45 AM - 9:00 AM UTC)

[15p-K505-16] Fabrication and Characterization of Optical Couplers Optimized with CMA-ES for Topological Slow Light Waveguides

〇Nao Harada^1,2, Riena Jinno¹, Ryoto Yanagisawa², Satomi Ishida¹, Hironobu Yoshimi³, Satoshi Iwamoto^1,2 (1.RCAST, The Univ. of Tokyo, 2.IIS, The Univ. of Tokyo, 3.Keio Univ.)

Keywords:

valley photonic crystal,slow light,optical coupler

Valley photonic crystal (VPC) waveguides enable efficient light propagation even in the presence of certain structural defects or sharp bends, and are expected to be applied to further miniaturization of optical circuits. We proposed and realized a topological slow light waveguide using VPC, and designed and fabricated an optical coupler by introducing defects into the junction between a wire waveguide and a topological slow-light waveguide. Next, aiming for higher efficiency, we designed an optical coupler with CMA-ES. Here, we fabricated it and evaluated its coupling efficiency.