Dynamically crossing diabolic points while encircling exceptional curves: A programmable symmetric-asymmetric multimode switch.

ABSTRACT: Nontrivial spectral properties of non-Hermitian systems can lead to intriguing effects with no counterparts in Hermitian systems. For instance, in a two-mode photonic system, by dynamically winding around an exceptional point (EP) a controlled asymmetric-symmetric mode switching can be realized. That is, the system can either end up in one of its eigenstates, regardless of the initial eigenmode, or it can switch between the two states on demand, by simply controlling the winding direction. However, for multimode systems with higher-order EPs or multiple low-order EPs, the situation can be more involved, and the ability to control asymmetric-symmetric mode switching can be impeded, due to the breakdown of adiabaticity. Here we demonstrate that this difficulty can be overcome by winding arou

SUBMITTER: Arkhipov II 

PROVIDER: S-EPMC10097868 | biostudies-literature | 2023 Apr

REPOSITORIES: biostudies-literature