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

doi:10.1103/PhysRevA.85.033825

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

School of Electrical Engineering

Research output: Contribution to journal › Article › peer-review

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.

Original language	English
Article number	033825
Journal	Physical Review A - Atomic, Molecular, and Optical Physics
Volume	85
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevA.85.033825
State	Published - 21 Mar 2012

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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.",

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AU - Suchkov, Sergey V.

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AU - Malomed, Boris A.

AU - Kivshar, Yuri S.

PY - 2012/3/21

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AB - 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.

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

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