[10a-N221-1~10] 3.10 Photonic structures and phenomena

11:15 AM - 11:30 AM JST(2:15 AM - 2:30 AM UTC)

[10a-N221-7] Chiral OAM Mode Control by Complex Perturbations in Coupled Resonator Systems

〇(M1)Kota Yagi^1,2, Takahiro Uemura^1,2, Yuto Moritake¹, Masaya Notomi^1,2,3 (1.Science Tokyo, 2.NTT BRL, 3.NTT NPC)

Keywords:

non-Hermitian system,photonic crystal,OAM

We have previously reported that placing metallic nanostructures in close proximity to hollow GaN nanowires leads to the emergence of modes carrying orbital angular momentum (OAM), corresponding to optical vortices. However, many aspects of similar phenomena remain unexplored. In this study, we demonstrate that, in a coupled triple-resonator system, the rotational direction of chiral OAM states can be switched via a minute complex perturbation. This result opens up the possibility of novel optical switches based on non-Hermitian perturbations.