论文标题
狄拉克 - 涡流拓扑光子晶体纤维
Dirac-vortex topological photonic crystal fibre
论文作者
论文摘要
光子晶体纤维的成功在很大程度上依赖于横截面中无数二维光子晶体。在这里，我们提出了一种拓扑带隙纤维，其沿平面方向的带隙通过具有涡旋相的狄拉克晶格的广义调制来打开。然后，保证中间隙缺陷模式的存在能够指导该Dirac-Qultex光纤核心的光，其中引导模式的数量等于空间涡流的绕组数。单涡流设计为带宽至一个八度的带宽提供了单极化单模式。
The success of photonic crystal fibres relies largely on the endless variety of two-dimensional photonic crystals in the cross-section. Here, we propose a topological bandgap fibre whose bandgaps along in-plane directions are opened by generalized Kekulé modulation of a Dirac lattice with a vortex phase. Then, the existence of mid-gap defect modes is guaranteed to guide light at the core of this Dirac-vortex fibre, where the number of guiding modes equals the winding number of the spatial vortex. The single-vortex design provides a single-polarization single mode for a bandwidth as large as one octave.
