Wave scattering on a domain wall in a chain of PT-symmetric couplers
Date
2012
Authors
Suchkov, Sergey V
Dmitriev, Sergey V
Malomed, Boris A
Kivshar, Yuri
Journal Title
Journal ISSN
Volume Title
Publisher
American Physical Society
Abstract
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.
Description
Keywords
Keywords: High frequency HF; High frequency waves; Linear arrays; Linear waves; Low frequency; Low-frequency waves; Transmitted waves; Wave scattering; Physics; Mathematical models
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Source
Physical Review A: Atomic, Molecular and Optical Physics
Type
Journal article