28 February 2017 Gap solitons in partially parity-time-symmetric optical lattices
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Proceedings Volume 10256, Second International Conference on Photonics and Optical Engineering; 1025606 (2017) https://doi.org/10.1117/12.2268780
Event: Second International Conference on Photonics and Optical Engineering, 2016, Xi'an, China
Abstract
The existence and stability of gap solitons are investigated in the semi-infinite gap of a partially parity-timesymmetric two-dimensional periodic potential (optical lattice), which is invariant under complex conjugation and reflection in a single spatial direction. Firstly we study the Bloch bands and band gaps of this partially parity-time-symmetric optical lattice. We find the partially parity-time-symmetric optical lattice can still possess all-real spectra and the phase transition point remains unchangeable. Secondly, we investigate the fundamental solitons in the semi-infinite gap of the partially parity-time-symmetric optical lattice. We get the continuous families of fundamental solitons, which own the same partial parity-time-symmetry as the partially parity-timesymmetric optical lattice. Thirdly, we study the linear stability of the fundamental solitons we have got. We also investigate nonlinear evolution of the partially parity-time solitons under perturbation. It has been found that the stable domains of fundamental solitons in the partially parity-time-symmetric optical lattices are bigger than those in parity-time-symmetric optical lattices.
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Lijuan Ge, "Gap solitons in partially parity-time-symmetric optical lattices", Proc. SPIE 10256, Second International Conference on Photonics and Optical Engineering, 1025606 (28 February 2017); doi: 10.1117/12.2268780; https://doi.org/10.1117/12.2268780
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