arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2302.05036physics.opticscond-mat.mes-hall
收藏

基于光子Floquet晶格的反手征边缘态

Anti-chiral edge states based on photonic Floquet lattices

Junying Wang, Xifeng Ji, Zhiwei Shi, Yajing Zhang, Huagang Li, Yang Li, Yaohua Deng, Kang Xie

摘要:

光子Floquet晶格提供了一个很好的平台,用于操纵不同的拓扑保护的边缘状态。然而,在Floquet晶格中,反手征边缘态还没有得到太多的讨论。在这里,我们提出了一种波导结构相结合的两个蜂窝Floquet光子晶格与相反的网站旋转方向。在这种结构中,我们发现反手征边缘态在两个平行的体边缘上具有相同的传输方向。随着两个子晶格在一个方向上的调制相位差的增加,带隙的宽度变得更小,边缘态的鲁棒性变得更弱。有趣的是,传输速度也由相位差控制。这些结果除了与Floquet晶格系统的拓扑性质有关外,还可应用于多通道光开关、光功能器件等领域。

英文摘要:

Photonic Floquet lattices provide an excellent platform for manipulating different topologically protect-ed edge states. However, anti-chiral edge states have not been discussed much in Floquet lattices. Here, we propose a waveguide structure by combining two honeycomb Floquet photonic lattices with oppo-site rotation directions. In this structure, we find that the anti-chiral edge states have the same trans-mission direction on two parallel body edges. With an increasing modulation phase difference between the two sublattices in one direction, the width of the band gap becomes smaller and the robustness of the edge states becomes weaker. Interestingly, the transmission speed is also controlled by the phase difference. In addition to their relevance for the topological properties of the Floquet lattice system, these results may be applied to multi-channel optical switches, optical functional devices, and in other fields.

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。

↑