[en] Chiral sensing is highly researched due to its applications and can be enhanced by Parity-Time (PT) symmetry in a scattering scheme. [1] PT-symmetry can be obtained in coupled waveguides with balanced gain and loss. [2] We numerically study how PT guided modes are impacted by inserting a chiral material in the gap between the waveguides. We observe a strong chiral impact at degeneracies, with various avoided crossings depending on the nature of the interacting modes. Additionally, we extend the existing coupling equations model to include chiral couplings.
Disciplines :
Physics
Author, co-author :
De corte, Alice ; Université de Mons - UMONS > Faculté des Sciences > Service des Matériaux Micro et Nanophotoniques
Besbes, Mondher; Université Paris-Saclay [FR] > Institut d'Optique Graduate School > Laboratoire Charles Fabry
Benisty, Henri; Université Paris-Saclay [FR] > Institut d'Optique Graduate School > Laboratoire Charles Fabry
Maes, Bjorn ; Université de Mons - UMONS > Faculté des Sciences > Service des Matériaux Micro et Nanophotoniques
Language :
English
Title :
Parity-time-symmetric waveguides with a chiral gap
Publication date :
21 September 2023
Event name :
Belgian Photonics Online Meetup bePOM - 4th edition
Event place :
Brussels, Belgium
Event date :
21-22 September 2023
Peer review/Selection committee :
Editorial reviewed
Research unit :
S803 - Matériaux Micro- et Nanophotoniques
Research institute :
R400 - Institut de Recherche en Science et Ingénierie des Matériaux
Funders :
FRIA - Fonds pour la Formation à la Recherche dans l'Industrie et dans l'Agriculture F.R.S.-FNRS - Fonds de la Recherche Scientifique
Funding text :
This work benefits from the support of the French Community of Belgium with the financing of a FRIA grant.
