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Hybridization of Different Types of Exceptional Point

Photonics Research
  • JINHYEOK RYU, Sunjae Gwak, Jaewon Kim, Hyeon-Hye Yu, ji-hwan kim, Ji-Won Lee, Chang-Hwan Yi, and Chil-Min Kim
  • received 07/08/2019; accepted 10/14/2019; posted 10/14/2019; Doc. ID 371951
  • 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 a chiral and a supermode second-order EP, where the former and the latter are the results of an intra-disk and an inter-disk mode coupling in an optical system comprized of two Mie-scale microdisks and one Rayleigh-scale scatterer. High sensitivity of the resulting third order EP against external perturbations in our feasible system is emphasized.
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