论文标题
沿不同配置的光子拓扑界面的边缘模式的强大传输
Robust Transport of the Edge Modes along the Photonic Topological Interfaces of Different Configurations
论文作者
论文摘要
已经提出了二维光子晶体在核壳介电材料上制成的六个空气孔，以研究新出现的光子量子自旋霍尔绝缘子。具体而言，在提出的方案上，C_6点组对称性支持了空调和核壳的半径修饰，而无需打破时间反转（TR）对称性。结果表明，通过修改光子结构的几何形状，可以实现从具有零自旋Chern数（CS）的普通绝缘子到具有非零CS的拓扑绝缘子的多个拓扑过渡。研究具有相反组速度的两个反向传播的螺旋边缘模式对于各种光学目的而言，均具有个人的重要性，例如无散射波导受保护，这些波导受到各种缺陷，疾病和强烈的轻度相互作用。我们表明，拓扑边缘状态表现出慢光特性。研究结果强调了一个事实，即探索拓扑相转换可以作为实现光传输，强大的能量运输和慢慢光的独特方法。
Two-dimensional photonic crystals made of six air holes on a core-shell dielectric material has been proposed to study the newly emerged photonic quantum spin Hall insulator. Specifically, radii modification of the air holes and core-shell without breaking time-reversal (TR) symmetry are supported by the C_6 point group symmetry upon a proposed scheme. It is shown that multiple topological transitions from an ordinary insulator with zero spin Chern number (Cs) to a topological insulator with a non-zero Cs can be achieved by modifying the geometry of the photonic structure. Studying the two counter-propagating helical edge modes which have the opposite group velocities are of individual importance for various optical purposes like scattering-free waveguides protected to various defects, disorders and strong light-matter interactions. We show that topological edge states demonstrate slow light characteristics. The findings emphasize the fact that exploring topological phase transition can be applied as a unique approach for realizing light transport, robust energy transportation and slow light in integrated photonic circuits and devices.
