A skyrmion is a topologically protected soliton with a spin structure on the micro/nano scale that has promising applications in magnetic information storage and spintronics devices. This study focuses on the optical skyrmion lattice structures created in the surface plasmon polaritons (SPPs) field. Both the Néel-type optical skyrmion lattice formed by the electric field vector and Bloch-type optical skyrmion lattice formed by the magnetic field vector are generated via exciting a hexagonal grating structure on the metal surface with six Gaussian optical spots. Such a multiple-spot excitation can be realized through tightly focusing a specially designed complex field with a high NA lens. Through introducing the phase difference of the excitation beams to shift the SPP standing waves, the shape and position of the optical skyrmion lattice can be dynamically controlled. Both the electric field vector and magnetic field vector are evaluated quantitatively based on the electric and magnetic field obtained by finite difference time domain (FDTD) simulation to demonstrate the validity and capability of the proposed technique.

中文翻译：

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表面等离振子极化子中光学天文子晶格的动态剪裁

天体离子是一种具有微/纳米尺度自旋结构的拓扑受保护的孤子，在磁信息存储和自旋电子设备中具有广阔的应用前景。这项研究的重点是在表面等离子激元（SPPs）场中产生的光学Skyrmion晶格结构。电场矢量形成的Néel型旋光天文晶格和磁场矢量形成的Bloch型旋光天文晶格都是通过在金属表面上激发具有六个高斯光斑的六边形光栅结构而生成的。这种多点激励可以通过使用高NA透镜紧密聚焦特殊设计的复杂场来实现。通过引入激发光束的相位差来改变SPP驻波，可以动态地控制光学天蝎座晶格的形状和位置。基于有限时域（FDTD）仿真获得的电场和磁场，对电场矢量和磁场矢量进行定量评估，以证明所提出技术的有效性和能力。