论文标题
由设计的方位极化梯度诱导的具有非均匀轨道角动量密度的混合载体束
Hybrid vector beams with non-uniform orbital angular momentum density induced by designed azimuthal polarization gradient
论文作者
论文摘要
基于共同路径干扰方法中正交基矢量的角度振幅调制，我们提出了一种有趣的杂种矢量梁，具有前所未有的方位影响极化梯度，并在实验中进行了证明。与先前报道的类型不同，合成杂化载体梁表现出在庞加雷球体上角极化状态的几何投影轨迹，而不仅仅是常规圆。更值得注意的是，设计的方位角极化梯度能够诱导方位角非均匀的轨道角动量密度，而通常用于圆形轨道案例，无论基本状态在同质的情况下都沉浸在同质的强度背景中。此外，通过调整相关参数，可以轻松实现更多特殊的极化映射轨道。这些特殊的功能可能会为新的光学效果和应用打开替代路线。
Based on angular amplitude modulation of orthogonal base vectors in common-path interference method, we propose an interesting type of hybrid vector beams with unprecedented azimuthal polarization gradient and demonstrate in experiment. Distinct to previously reported types, the synthetic hybrid vector beams exhibit geometrically intriguing projection tracks of angular polarization state on Poincare sphere, more than just conventional circles. More noteworthily, the designed azimuthal polarization gradients are found to be able to induce azimuthally non-uniform orbital angular momentum density, while generally uniform for circle-track cases, immersing in homogenous intensity background whatever base states are. Moreover, via tailoring relevant parameters, more special polarization mapping tracks can be handily achieved. These peculiar features may open alternative routes for new optical effects and applications.
