Photonics Research, 2019, 7 (12): 12001473, Published Online: Nov. 21, 2019
Hybridization of different types of exceptional points Download: 586次
Abstract
A large number of different types of second-order non-Hermitian degeneracies called exceptional points (EPs) were found in various physical systems depending on the mechanism of coupling between eigenstates. We show that these EPs can be hybridized to form higher-order EPs, which preserve the original properties of the initial EPs before hybridization. For a demonstration, we hybridize chiral and supermode second-order EPs, where the former and the latter are the results of intra-disk and inter-disk mode coupling in an optical system comprised of two Mie-scale microdisks and one Rayleigh-scale scatterer. The high sensitivity of the resulting third-order EP against external perturbations in our feasible system is emphasized.
Jinhyeok Ryu, Sunjae Gwak, Jaewon Kim, Hyeon-Hye Yu, Ji-Hwan Kim, Ji-Won Lee, Chang-Hwan Yi, Chil-Min Kim. Hybridization of different types of exceptional points[J]. Photonics Research, 2019, 7(12): 12001473.