An anti-phase boundary is formed by shifting a portion of photonic crystal lattice along the direction of periodicity. A spinning magnetic dipole is applied to excite edge modes on the anti-phase boundary. We show the unidirectional propagation of the edge modes which is also known as spin-momentum locking. Band inversion of the edge modes is discovered when we sweep the geometrical parameters, which leads to a change in the propagation direction. Also, an optimized source is applied to excite the unidirectional edge mode with high directivity.

中文翻译：

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光子晶体反相边界上的自旋动量锁定模式。

通过沿周期性方向移动光子晶体晶格的一部分来形成反相边界。应用旋转的磁偶极子在反相边界上激发边缘模式。我们显示了边缘模式的单向传播，这也称为自旋动量锁定。当我们扫描几何参数时，会发现边缘模式的能带反转，从而导致传播方向发生变化。而且，应用了优化的光源来激发具有高方向性的单向边缘模式。