[10p-Z17-1~19] 3.12 Nanoscale optical science and near-field optics

[10p-Z17-18] Numerical study on exceptional point in Jones matrix of coupled plasmonic resonators

〇Yuto Moritake^1,2, Masaya Notomi^1,3,4 (1.Tokyo Tech, 2.JST Presto, 3.NTT NPC, 4.NTT BRL)

Keywords:Non-Hermitian system, Exceptional point, plasmonics

In this study, we investigated exceptional point and PT phase transition in Jones matrix on coupled plasmonic resonators. Non-Hermitian Jones matrix with PT symmetry was achieved by introducing additional loss material into one resonators. In the system, there should be two orthogonal eigen-polarization states in Jones matrix. However, near exceptional point, two pol. states approach on Poincare sphere each other, and ideally coalesce. we numerically confirm this polarization evolution through controlling coupling strength between the resonators.