Multiple Longitudinal Polarization Vortices Generated via All-Silicon Metasurface,Annalen Der Physik

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Multiple Longitudinal Polarization Vortices Generated via All-Silicon Metasurface
Annalen Der Physik ( IF 2.2 ) Pub Date : 2021-07-24 , DOI: 10.1002/andp.202100159
Chenglong Zheng ₁ , Jie Li ₁ , Jitao Li ₁ , Zhen Yue ₁ , Hongliang Zhao ₁ , Xuanruo Hao ₁ , Yating Zhang ₁ , Jianquan Yao ₁

Affiliation

Photons carry spin angular momentum and orbital angular momentum, vortex beams with helical phase fronts provide a new understanding of optical and physical phenomena. Here, the creation of four longitudinal polarized vortices with arbitrary topological charges is demonstrated using all-silicon metasurfaces in terahertz band, integrating propagation phase and Pancharatnam–Berry phase. This efficient scheme allows the authors to flexibly control the longitudinal polarized electric field by designing the field distribution of the transverse polarization. As a proof of concept, two metasurfaces are designed to demonstrate the flexibility of such approach. One is used to generate dual longitudinal polarized superpositions of orbital angular momentum states with arbitrary topological charges, and the other is designed to generate four discrete longitudinal vortices. This method may find applications in manipulation of electron bunches and new imaging technology.

中文翻译：

通过全硅超表面产生的多个纵向极化涡流

光子携带自旋角动量和轨道角动量，具有螺旋相前沿的涡旋光束提供了对光学和物理现象的新理解。在这里，使用太赫兹波段的全硅超表面、整合传播相位和 Pancharatnam-Berry 相位证明了四个具有任意拓扑电荷的纵向极化涡旋的产生。这种高效的方案允许作者通过设计横向极化的场分布来灵活控制纵向极化电场。作为概念证明，设计了两个超表面来证明这种方法的灵活性。一种用于生成具有任意拓扑电荷的轨道角动量态的双纵向极化叠加，另一个设计为产生四个离散的纵向涡流。这种方法可能会应用于电子束的操纵和新的成像技术。

更新日期：2021-07-24

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