论文标题
开放涡流束的产生和传播
Generation and propagation of an open vortex beam
论文作者
论文摘要
我们从理论上和实验研究了一类新型的涡流梁，称为开放涡流梁（OVB）。使用部分阻断的叉形光栅（PB-FSG）衍射的高斯梁生成此类梁。近场和远场中的OVB的分析模型由超测量（HYG）模式的超级置换给出。与常规整数和分数涡流梁不同，OVB既可以具有开环结构，又有整数拓扑电荷（TC）。 TC由开环覆盖的周长决定。还量化的表明，由于花序相移，ovb的ovb传播发生了$π/2 $旋转。 futhermore，我们证明了OVB的实验生成和检测。我们的实验结果与该理论非常吻合。我们认为，OVB可以成为许多应用的潜在候选者，例如粒子操纵，量子信息和光学计量学。
We theoretically and experimentally studied a novel class of vortex beams named open vortex beams (OVBs). Such beams are generated using Gaussian beams diffracted by partially blocked fork-shaped gratings (PB-FSGs).The analytical model of OVBs in the near field and far field is given by superpositions of Hypergeometric (HyG) modes. Unlike conventional integer and fractional vortex beams, the OVBs can have both an open ring structure and an integer topological charge (TC). The TC is decided by the circumference covered by the open ring. It is also quantitatively shown that a $π/2$ rotation of the open ring occurs in the propagation of an OVB due to the Gouy phase shift. Futhermore, we demonstrate experimental generation and detection of OVBs. Our experimental results are in very good agreement with the theory. We believe that the OVB can be the potential candidate for numerous applications, such as particle manipulation, quantum information and optical metrology.
