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arXiv 2209.01441physics.opticsnlin.PS
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光子石墨烯中的谷霍尔边缘孤子

Valley Hall edge solitons in a photonic graphene

Qian Tang, Boquan Ren, Victor O. Kompanets, Yaroslav V. Kartashov, Yongdong Li, Yiqi Zhang

摘要:

我们预测了在两个反转对称破缺的蜂窝晶格之间具有畴壁的复合光子石墨烯中谷霍尔边缘孤子的存在并研究了其性质。在我们的系统中的反演对称性被打破,由于失谐引入到蜂窝结构的组成子晶格。我们表明,非线性谷霍尔边缘状态具有足够高的振幅分叉的线性谷霍尔边缘状态支持的域壁,可以分裂成组的亮点由于调制不稳定性的发展,这种不稳定性是一个前兆形成的拓扑亮谷霍尔边缘孤子本地化由于非线性自作用和沿域壁在很大的距离。通过模拟谷霍尔边缘孤子通过$Ω$形畴壁尖角的过程,证明了谷霍尔边缘孤子的拓扑保护。

英文摘要:

We predict the existence and study properties of the valley Hall edge solitons in a composite photonic graphene with a domain wall between two honeycomb lattices with broken inversion symmetry. Inversion symmetry in our system is broken due to detuning introduced into constituent sublattices of the honeycomb structure. We show that nonlinear valley Hall edge states with sufficiently high amplitude bifurcating from the linear valley Hall edge state supported by the domain wall, can split into sets of bright spots due to development of the modulational instability, and that such an instability is a precursor for the formation of topological bright valley Hall edge solitons localized due to nonlinear self-action and travelling along the domain wall over large distances. Topological protection of the valley Hall edge solitons is demonstrated by modeling their passage through sharp corners of the $Ω$-shaped domain wall.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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