Guided modes in non-Hermitian optical waveguides

Turitsyna, Elena, Shadrivov, Ilya and Kivshar, Yuri S. (2017). Guided modes in non-Hermitian optical waveguides. Physical Review A, 96 (3),

Abstract

We study guided modes in non-Hermitian optical waveguides with dielectric layers having either gain or loss. For the case of a three-layer waveguide, we describe stationary regimes for guided modes when gain and loss compensate each other in the entire structure rather than in each layer. We demonstrate that, by adding a lossless dielectric layer to a double-layer waveguide with the property of parity-time (PT) symmetry, we can control a ratio of gain and loss required to support propagating and nondecaying optical guided modes. This novel feature becomes possible due to the modification of the mode structure, and it can allow using materials with a lower gain to balance losses in various optical waveguiding structures. In addition, we find a non-PT-symmetric regime when all guided modes of the system have their losses perfectly compensated.

Publication DOI: https://doi.org/10.1103/PhysRevA.96.033824
Divisions: Engineering & Applied Sciences > Electrical, electronic & power engineering
Engineering & Applied Sciences > Institute of Photonics
Additional Information: ©2017 American Physical Society. Funding: Australian Research Council and participation in the Erasmus Mundus NANOPHI project under Contract No. 2013 5659/002-001.
Uncontrolled Keywords: Atomic and Molecular Physics, and Optics
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
Published Date: 2017-09-12
Authors: Turitsyna, Elena ( 0000-0003-1756-362X)
Shadrivov, Ilya
Kivshar, Yuri S.

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