Stability Through Asymmetry: Modulationally Stable Nonlinear Supermodes of Asymmetric non-Hermitian Optical Couplers

Anastasios Bountis, Sergej Flach, Yannis Kominis

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)

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.
Original languageEnglish
Pages (from-to)063832
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume95
Publication statusPublished - 2017

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