首页> 外文期刊>The European physical journal, D. Atomic, molecular, and optical physics >Two-dimensional defect solitons in parity-time-symmetric periodic optical lattices
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Two-dimensional defect solitons in parity-time-symmetric periodic optical lattices

机译:奇偶时间对称周期光学晶格中的二维缺陷孤子

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摘要

We report on the existence and stability of two-dimensional (2D) fundamental defect solitons (DSs) in parity-time (PT) symmetric periodic optical lattices based on focusing and defocusing nonlinear media, respectively. The stable regions of DSs in focusing and defocusing nonlinear media are calculated for the point defect. With the introduction of gain and loss component, some unique properties of 2D spatial DSs are displayed in such lattice potential. There exists transverse power-flow in the PT symmetric periodic optical lattice, and the DSs in the high power regions are unstable. Some properties in focusing nonlinear media are very different from those in defocusing nonlinear media. DSs in PT symmetric lattices with line defect based on focusing nonlinearity are studied as well.
机译:我们报道了分别基于聚焦和散焦非线性介质的奇偶时间(PT)对称周期性光学晶格中二维(2D)基本缺陷孤子(DSs)的存在和稳定性。针对点缺陷,计算了聚焦和散焦非线性介质中DS的稳定区域。随着增益和损耗分量的引入,在这种晶格势中显示了二维空间DS的某些独特属性。在PT对称周期性光学晶格中存在横向功率流,高功率区域中的DS不稳定。聚焦非线性介质的某些特性与散焦非线性介质的某些特性非常不同。还研究了基于聚焦非线性的具有线缺陷的PT对称晶格中的DS。

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