Chinese Journal of Lasers, Volume. 43, Issue 12, 1208001(2016)
Research on Defect Solitons in Kagome Photonic Lattices in Centrosymmetric Photorefractive Crystals
Defect solitons and their stability are reported in Kagome photonic lattices in centrosymmetric photorefractive crystals. These defect solitons exist in different gaps due to the change of defect intensity. When the defect is positive, these defect solitons exist only in the semi-infinite gap. By using the perturbation growth rate and beam propagation method, the stability of these defect solitons is investigated. The analysis indicates that the stability of these defect solitons tested by the perturbation growth rate and beam propagation method is same, the positive defect solitons are stable in the low power region and unstable in the high power region. When the defect is negative, these defect solitons exist both in the semi-infinite gap and the first gap. Negative defect solitons in the semi-infinite gap are stable in the moderate power region and unstable in the high and low power regions. In the first gap, the negative defect solitons are always stable.
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Zhang Baoju, Lu Keqing, Zhao Chong, Gao Lixu. Research on Defect Solitons in Kagome Photonic Lattices in Centrosymmetric Photorefractive Crystals[J]. Chinese Journal of Lasers, 2016, 43(12): 1208001
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Received: Aug. 31, 2016
Accepted: --
Published Online: Dec. 9, 2016
The Author Email: Baoju Zhang (bjzhang14tj@126.com)