[Th-P] Nanophotonics

[Th-P-73] Non-Hermitian Perturbation Induced OAM Mode Generation in a Discrete Coupled Cavity System Based on a Photonic Crystal Platform

〇Sotatsu Yanagimoto^1,2, Masato Takiguchi^1,2, Hisashi Sumikura^1,2, Masaya Notomi^1,2,3 (1. NTT BRL (Japan), 2. NTT Nanophotonics Center (Japan), 3. Institute of Science Tokyo (Japan))

We propose an approach for generating OAM modes using coupled L3 cavities in a slab-type photonic crystal. Waveguides break the system’s mirror symmetry and introduce asymmetric loss, enabling chiral OAM modes. By tuning the waveguide structural parameters, both a relatively high Q factor and strong chirality are achieved.