论文标题
Dirac点附近的巨型光子旋转大厅效应
Giant photonic spin Hall effect near the Dirac points
论文作者
论文摘要
传统光学界面上光的自旋轨道相互作用的起源在于光子极化的横向性质：与平面波组件相关的极化经历略有不同的旋转，以满足反射或折射后的横向性。拓扑光子材料的最新进展为在独特的光学接口处重新检查光的自旋轨道相互作用提供了重要的机会。在这里，我们建立了一个通用模型，以描述光子狄拉克元晶体中光的自旋轨道相互作用。当高斯光束撞击光子狄拉克元素晶体的界面时，我们发现狄拉克点附近的巨型光子自旋霍尔效应。巨大的光子自旋霍尔效应归因于光的强旋轨相互作用，这表现为不同平面波组件的大极化旋转。我们认为，这些结果可能会洞悉拓扑光子系统中光旋转相互作用的基本特性。
The origin of spin-orbit interaction of light at a conventional optical interface lies in the transverse nature of the photon polarization: The polarizations associated with the plane-wave components experience slightly different rotations in order to satisfy the transversality after reflection or refraction. Recent advances in topological photonic materials provide crucial opportunities to reexamine the spin-orbit interaction of light at the unique optical interface. Here, we establish a general model to describe the spin-orbit interaction of light in the photonic Dirac metacrystal. We find a giant photonic spin Hall effect near the Dirac points when a Gaussian beam impinges at the interface of the photonic Dirac metacrystal. The giant photonic spin Hall effect is attribute to the strong spin-orbit interaction of light, which manifests itself as the large polarization rotations of different plane-wave components. We believe that these results may provide insight into the fundamental properties of the spin-orbit interaction of light in the topological photonic systems.
