论文标题
矢量场发散操作的光学计算
Optical computation of divergence operation for vector field
论文作者
论文摘要
拓扑物理学需要稳定的方法来测量光学矢量场中的极化奇异性。在这里，提出了定期的等离子跨表面来对矢量近距离束进行发散计算。我们设计了这样的光学设备，以同时沿两个方向计算两个方向的空间分化，同时垂直于入射平面。通过在两个衍生结果之间创建建设性干扰来实现差异操作。我们证明，这种光学计算为阐明向量场的特定极化奇异性提供了新的直接途径。
Topological physics desires stable methods to measure the polarization singularities in optical vector fields. Here a periodic plasmonic metasurface is proposed to perform divergence computation of vectorial paraxial beams. We design such an optical device to compute spatial differentiation along two directions, parallel and perpendicular to the incident plane, simultaneously. The divergence operation is achieved by creating the constructive interference between two derivative results. We demonstrate that such optical computations provide a new direct pathway to elucidate specific polarization singularities of vector fields.
