论文标题
表征涡流束干扰模式的时间旋转和径向扭曲
Characterizing the temporal rotation and radial twist of the interference pattern of vortex beam
论文作者
论文摘要
我们在实验和理论上表征了涡流束的干扰模式的时间旋转和径向扭曲，并具有其共轭副本。为了定量研究时间旋转和径向扭曲，我们可以使用可移动的Mach-Zhhnder干涉仪以频率或波前曲率差来控制结合光束。系统地探索了物理参数（即涡旋束的拓扑电荷，频率差和波前曲率差异）对时间旋转以及径向扭曲的影响。我们进一步测量了两个参数，分别是旋转速度$ω$和扭曲系数$α$，以表征干扰模式的时间旋转程度和径向扭曲的程度。对涡流束的干扰模型的理论与实验结果达成了良好的协议。这项工作是研究干扰模式的详细结构，并用叠加的涡流梁操纵物质。
We experimentally and theoretically characterize the temporal rotation and radial twist of the interference pattern of vortex beam with its conjugate copy. To quantitatively study the temporal rotation and radial twist, we controllably modify the conjugate beam with a frequency or wavefront curvature difference using a movable Mach-Zehnder interferometer. The effects of the physical parameters (i.e., the topological charge, frequency difference and wavefront curvature difference of the vortex beams) on the temporal rotation as well as radial twist are systematically explored. We further measure two parameters, the rotation velocity $Ω$ and twist coefficient $α$, respectively, to characterize the degree of the temporal rotation and radial twist of the interference pattern. The theory of the interference model on vortex beams have good agreements with the experimental results. This work is favorite to study the detailed structure of the interference pattern and manipulate matter with superimposed vortex beams.
