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arXiv 2007.09067physics.opticsnlin.PS
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非线性高阶极化激元拓扑绝缘体

Nonlinear higher-order polariton topological insulator

Yiqi Zhang, Y. V. Kartashov, L. Torner, Yongdong Li, A. Ferrando

摘要:

研究了用可果美微腔柱实现的高阶非线性拓扑绝缘体中激子-极化激元角态的共振响应和双稳态。这种状态是共振激发的,存在由于泵和损耗之间的平衡,一方面,和非均匀的潜在景观的非线性和色散之间,另一方面,为泵能量周围的本征能量相应的线性局域模式。高阶拓扑绝缘体中非线性角态的局域化可以通过调节泵浦能量来有效控制。我们将角态的形成机制与截断的kagome阵列的对称性联系起来。角态与密集的边缘态共存,但在能量上与它们很好地隔离。非线性角态即使在角微腔柱中存在微扰的情况下仍然存在。

英文摘要:

We address the resonant response and bistability of the exciton-polariton corner states in a higher-order nonlinear topological insulator realized with kagome arrangement of microcavity pillars. Such states are resonantly excited and exist due to the balance between pump and losses, on the one hand, and between nonlinearity and dispersion in inhomogeneous potential landscape, on the other hand, for pump energy around eigen-energies of corresponding linear localized modes. Localization of the nonlinear corner states in a higher-order topological insulator can be efficiently controlled by tuning pump energy. We link the mechanism of corner state formation with symmetry of the truncated kagome array. Corner states coexist with densely packed edge states, but are well-isolated from them in energy. Nonlinear corner states persist even in the presence of perturbations in corner microcavity pillar.

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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