Wave scattering on a domain wall in a chain of PT-symmetric couplers

Sergey V. Suchkov*, Sergey V. Dmitriev, Boris A. Malomed, Yuri S. Kivshar

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

38 Scopus citations


We study wave propagation in linear arrays composed of pairs of conjugate waveguides with balanced gain and loss, that is, arrays of PT-symmetric couplers, where the linear spectrum is known to feature high-frequency and low-frequency branches. We introduce a domain wall by switching the gain and loss in half of the array and analyze the scattering of linear waves on this defect. The analysis reveals two major effects: amplification of both reflected and transmitted waves and excitation of the reflected and transmitted low-frequency and high-frequency waves by the incident high-frequency and low-frequency waves, respectively.

Original languageEnglish
Article number033825
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number3
StatePublished - 21 Mar 2012


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