Higher-order Dirac solitons in binary waveguide arrays |
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Authors: | Truong X Tran Dũng C Duong |
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Institution: | 1. Department of Physics, Le Quy Don University, 236 Hoang Quoc Viet str., 10000 Hanoi, Viet Nam;2. Max Planck Institute for the Science of Light, Günther-Scharowsky str. 1, 91058 Erlangen, Germany |
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Abstract: | We study optical analogues of higher-order Dirac solitons (HODSs) in binary waveguide arrays. Like higher-order solitons obtained from the well-known nonlinear Schrödinger equation governing the pulse propagation in an optical fiber, these HODSs have amplitude profiles which are numerically shown to be periodic over large propagation distances. At the same time, HODSs possess some unique features. Firstly, the period of a HODS depends on its order parameter. Secondly, the discrete nature in binary waveguide arrays imposes the upper limit on the order parameter of HODSs. Thirdly, the order parameter of HODSs can vary continuously in a certain range. |
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Keywords: | Binary waveguide array Higher-order Dirac soliton Kerr nonlinearity Quantum-optical analogies |
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