论文标题
一般角落在2D SSH模型中使用Intracelluar的下一个最新纽布跳跃
General corner states in 2D SSH model with intracelluar next-nearest-neighbour hopping
论文作者
论文摘要
我们在具有零量规通量的正方形晶格上调查了光子二维（2D）SU-SCHRIEFFER-HEEGER（SSH）模型中的角状态。通过考虑下一个新的邻居（NNN）跳，我们发现了2D SSH模型中的一系列角落状态，并表明它们对某些制造障碍具有强大的态度。此外，这些角状态位于角落周围，但不在角点，因此我们称它们为一般角落状态。我们在分析上确定，一般角状态是由ellaceluar nnn跳（远程相互作用）诱导的，并从边缘频段脱离。我们的作品显示了一种简单的方法，可以通过长期互动来诱导独特的角落状态，并提供了设计新型光子设备的机会。
We investigate corner states in a photonic two-dimensional (2D) Su-Schrieffer-Heeger (SSH) model on a square lattice with zero gauge flux. By considering intracelluar next-nearest-neighbor (NNN) hoppings, we discover a broad class of corner states in the 2D SSH model, and show that they are robust against certain fabrication disorders. Moreover, these corner states are located around the corners, but not at the corner points, so we refer to them as general corner states. We analytically identify that the general corner states are induced by the intracelluar NNN hoppings (long-range interactions) and split off from the edge-state bands. Our work show a simple way to induce unique corner states by the long-range interactions, and offers opportunities for designing novel photonic devices.
