Wave scattering on a domain wall in a chain of PT-symmetric couplers
Optics
2015-06-04 v1 Pattern Formation and Solitons
Abstract
We study wave propagation in linear arrays composed of pairs of conjugate waveguides with balanced gain and loss, i.e. arrays of the 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 a 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.
Cite
@article{arxiv.1202.5629,
title = {Wave scattering on a domain wall in a chain of PT-symmetric couplers},
author = {Sergey V. Suchkov and Sergey V. Dmitriev and Boris A. Malomed and Yuri S. Kivshar},
journal= {arXiv preprint arXiv:1202.5629},
year = {2015}
}
Comments
7 pages, 9 figures, Physical Review A, in press