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

Suchkov, Sergey V; Dmitriev, Sergey V; Malomed, Boris A; Kivshar, Yuri


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...[Show more]

CollectionsANU Research Publications
Date published: 2012
Type: Journal article
Source: Physical Review A: Atomic, Molecular and Optical Physics
DOI: 10.1103/PhysRevA.85.033825


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