Stability through asymmetry: Modulationally stable nonlinear supermodes of asymmetric non-Hermitian optical couplers
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Date
2017-06-21
Authors
Kominis, Yannis
Bountis, Tassos
Flach, Sergej
Journal Title
Journal ISSN
Volume Title
Publisher
Physical Review A
Abstract
We analyze the stability of a non-Hermitian coupler with respect to modulational inhomogeneous perturbations
in the presence of unbalanced gain and loss. At the parity-time (PT ) symmetry point the coupler is unstable.
Suitable symmetry breakings lead to an asymmetric coupler, which hosts nonlinear supermodes. A subset of these
broken symmetry cases finally yields nonlinear supermodes which are stable against modulational perturbations.
The lack of symmetry requirements is expected to facilitate experimental implementations and relevant photonics
applications.
Description
Keywords
non-Hermitian coupler
Citation
Yannis Kominis, Tassos Bountis, Sergej Flach. 2018. Stability through asymmetry: Modulationally stable nonlinear supermodes of asymmetric non-Hermitian optical couplers. Physical Review A