arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2402.08650physics.optics
收藏

传播不变的光学meron晶格

Propagation-invariant optical meron lattices

David Marco, Isael Herrera, Sophie Brasselet, Miguel A. Alonso

AI总结:

研究引入并实验制备了在传播中保持不变的周期性skyrmionic偏振meron晶格光束,通过少量平面波组合实现了方形与三角晶格及均匀局部旋转的晶格族。

摘要:

我们引入并在实验中制备了在传播的每个横截面上呈现周期性skyrmionic偏振晶格的光束。这些纹理是由映射Poincaré球半球的平铺组成的meron晶格。所提出的所有场都是少量平面波的组合。首先,我们提出了方形晶格,其Skyrme密度(Poincaré球与物理空间之间映射的Jacobian)在符号上振荡,但其强度分布是恒定的。其次,我们提出了保持Skyrme密度符号的三角晶格。这两种晶格在传播下均保持不变。最后,我们引入了一族具有均匀Skyrme密度符号的晶格,由映射到Poincaré球同一半球的方形平铺组成。在这些晶格中,偏振态在传播过程中经历均匀的局部周期性旋转,从而保持了纹理的Skyrme密度分布。

英文摘要:

We introduce and produce experimentally optical beams exhibiting periodic skyrmionic polarization lattices at each transverse plane of propagation. These textures are meron lattices formed by tiles mapping hemispheres of the Poincaré sphere. All presented fields are combinations of a small number of plane waves. Firstly, we propose square lattices with a Skyrme density (the Jacobian of the mapping between the Poincaré sphere and physical space) that oscillates in sign but whose intensity distribution is constant. Secondly, we present triangular lattices preserving the Skyrme density's sign. Both lattices are invariant under propagation. Finally, we introduce a family of lattices with uniform Skyrme density sign, composed of square tiles that map to the same hemisphere of the Poincaré sphere. In these lattices, the polarization state undergoes a uniform local periodic rotation during propagation, thus preserving the texture's Skyrme density distribution.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑