Dynamically crossing diabolic points while encircling exceptional curves: A programmable symmetric-asymmetric multimode switch.
Journal
Nature communications
ISSN: 2041-1723
Titre abrégé: Nat Commun
Pays: England
ID NLM: 101528555
Informations de publication
Date de publication:
12 Apr 2023
12 Apr 2023
Historique:
received:
01
11
2022
accepted:
10
03
2023
medline:
13
4
2023
entrez:
12
4
2023
pubmed:
13
4
2023
Statut:
epublish
Résumé
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 around exceptional curves by additionally crossing diabolic points. We consider a four-mode [Formula: see text]-symmetric bosonic system as a platform for experimental realization of such a multimode switch. Our work provides alternative routes for light manipulations in non-Hermitian photonic setups.
Identifiants
pubmed: 37045822
doi: 10.1038/s41467-023-37275-5
pii: 10.1038/s41467-023-37275-5
pmc: PMC10097868
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
2076Informations de copyright
© 2023. The Author(s).
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