講演情報
[15a-K505-4]Nanoscale OAM light generation with asymmetric hollow nanowire design
〇(B)Xuen Zhen Lim1, Masato Takiguchi1,2, Ryuji Kuruma3, Hisashi Sumikura1,2, Masaya Notomi1,2,3 (1.NTT BRL, 2.NTT NPC, 3.Science Tokyo)
キーワード：
OAM、Nanowire、GaN
OAM is achieved with a hexagonal GaN hollow nanowire by breaking the geometrical mirror symmetry using an alternative central airhole design. The central airhole is designed using six overlapping circular airholes placed in a circular formation, creating a gear-like pattern. The radius, radial offset, and rotational offset of the airholes are then optimized with Fuzzy Self-Tuning Particle Swarm Algorithm. In this study, we were able to achieve an OAM of |l|=5.7 with a mode purity of 97% and Q-factor of 200-250 on a whispering gallery mode of order m=6.