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arXiv 1605.09501physics.opticscond-mat.mes-hall
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非线性光子拓扑绝缘体中的边缘孤子

Edge Solitons in Nonlinear Photonic Topological Insulators

Daniel Leykam, Y. D. Chong

摘要:

我们从理论上证明了光子拓扑绝缘体可以支持边缘孤子,这些边缘孤子具有很强的自局域性,并且沿着晶格边缘单向传播。光子拓扑绝缘体由耦合螺旋波导的Floquet晶格组成,在具有局部克尔非线性的介质中。线性晶格的拓扑相位对孤子的行为有很大的影响。拓扑非平凡相给出了一个连续的孤子族,而拓扑平凡相给出了一个嵌入的孤子,发生在一个单一的权力,并产生自诱导的局部非线性位移的站点间耦合。孤立子可用于非线性开关和逻辑运算,这些功能在拓扑光子学中尚未被探索。我们演示了利用孤子通过窄通道进行选择性滤波,以及利用孤子碰撞进行光开关。

英文摘要:

We show theoretically that a photonic topological insulator can support edge solitons that are strongly self-localized and propagate unidirectionally along the lattice edge. The photonic topological insulator consists of a Floquet lattice of coupled helical waveguides, in a medium with local Kerr nonlinearity. The soliton behavior is strongly affected by the topological phase of the linear lattice. The topologically nontrivial phase gives a continuous family of solitons, while the topologically trivial phase gives an embedded soliton that occurs at a single power, and arises from a self-induced local nonlinear shift in the inter-site coupling. The solitons can be used for nonlinear switching and logical operations, functionalities that have not yet been explored in topological photonics. We demonstrate using solitons to perform selective filtering via propagation through a narrow channel, and using soliton collisions for optical switching.

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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