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.
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 language | English |
|---|---|
| Pages (from-to) | 063832 |
| Journal | Physical Review A - Atomic, Molecular, and Optical Physics |
| Volume | 95 |
| Publication status | Published - 2017 |