Department of Physics, National Taiwan Normal University, 88 Tingchou Road, Sec. 4, Taipei 11677, Taiwan.
Institute for Ultrafast Spectroscopy and Lasers, Physics Department, The City College of New York of the City University of New York, New York, NY 10031, USA.
Sci Rep. 2016 Dec 21;6:39657. doi: 10.1038/srep39657.
We propose and experimentally demonstrate a new complex laser beam with inhomogeneous polarization distributions mapping onto high-order Poincaré spheres (HOPSs). The complex laser mode is achieved by superposition of Laguerre-Gaussian modes and manifests exotic flower-like localization on intensity and phase profiles. A simple optical system is used to generate a polarization-variant distribution on the complex laser mode by superposition of orthogonal circular polarizations with opposite topological charges. Numerical analyses of the polarization distribution are consistent with the experimental results. The novel flower HOPS beams can act as a new light source for photonic applications.
我们提出并实验演示了一种新的具有非均匀偏振分布的复杂激光光束，该光束映射到高阶庞加莱球（HOPS）上。通过拉盖尔-高斯模式的叠加实现了复杂的激光模式，并在强度和相位分布上表现出奇特的花状局域化。通过具有相反拓扑电荷的正交圆偏振的叠加，使用简单的光学系统在复杂的激光模式上产生偏振变化分布。偏振分布的数值分析与实验结果一致。新型花状 HOPS 光束可以作为光子应用的新光源。
