Surface defect lattice solitons in photovoltaic-photorefractive crystals
Surface defect lattice solitons in photovoltaic-photorefractive crystals
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DOI：
10.1016/j.optcom.2014.09.015
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发表时间：
2015-01
影响因子：
2.4
通讯作者：
Chunxiang Wang;K. Lu;Weijun Chen;Huimin Yu;Kai Hu
中科院分区：
文献类型：
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作者：
Chunxiang Wang;K. Lu;Weijun Chen;Huimin Yu;Kai Hu
报道了具有缺陷的光子晶格与均匀的光伏-光折变(PP)晶体之间的界面可以支持表面缺陷晶格孤子(SDLS)。我们证明了当缺陷为正时，这些SDLS只存在于半无限空隙中，而当缺陷为负时，这些SDLS既存在于半无限空隙中，又存在于第一个空隙中。对于正缺陷，SDLSS在高功率区和低功率区稳定，在中等功率区不稳定。对于负缺陷，半无限带隙中的SDLSS在中等功率范围内稳定，在高、低功率范围内不稳定。在第一个空隙中，SDLS在所有功率区域都是稳定的。结果表明，SDLSs的稳定区随正缺陷强度的增大而增大，随负缺陷强度的增大而减小，其功率随正缺陷强度的增大而减小，随负缺陷强度的增大而增大。
We report that surface defect lattice solitons (SDLSs) can be supported at the interface between the photonic lattices with a defect and the uniform photovoltaic-photorefractive (PP) crystal. We show that these SDLSs exist only in the semi-infinite gap when the defect is positive and both in the semi-infinite gap and the first gap when the defect is negative. For a positive defect, SDLSs are stable in the high and low power regions and unstable in the moderate power region. For a negative defect, SDLSs 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, SDLSs are stable in the all power regions. We find that the stable region of SDLSs increases with the positive defect strength and decreases with an increase in the negative defect strength and the power of SDLSs decrease with an increase in the positive defect strength and increase with the negative defect strength.