Kekulé型光子晶体的拓扑边缘态
Topological edge states of Kekulé-type photonic crystals induced by a synchronized rotation of unit cells
摘要：
由于易于实现，在人造原子晶体中生成和操纵狄拉克点受到了人们的关注，尤其是在光子系统中。本文提出了一种由纯玻色子的Kekulé晶格构成的二维光子晶体，其中圆柱的内旋转引起光学Dirac简并破缺。我们计算的色散揭示了同步旋转反转能带和开关奇偶性，以及，以诱导拓扑相变。我们的模拟表明，这种拓扑保护的边缘状态可以在变形下的缺陷波导中实现鲁棒传输，因此提供了一个实用的可调方案，以实现可重构的拓扑相位。
英文摘要：
Generating and manipulating Dirac points in artificial atomic crystals has received attention especially in photonic systems due to their ease of implementation. In this paper, we propose a two-dimensional photonic crystal made of a Kekulé lattice of pure dielectrics, where the internal rotation of cylindrical pillars induces optical Dirac-degeneracy breaking. Our calculated dispersion reveals that the synchronized rotation reverses bands and switches parity as well so as to induce a topological phase transition. Our simulation demonstrates that such topologically protected edge states can achieve robust transmission in defect waveguides under deformation, and therefore provides a pragmatically tunable scheme to achieve reconfigurable topological phases.
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。
