In the last decade, the plasmonic vortex field has been studied extensively due to intriguing properties such as high field enhancement, optical singularity, and orbital angular momentum. In this work, we propose metananoslots that consist of paired orthogonal nanoslots arranged in an Archimedes spiral distribution. The metananoslots work as a plasmonic vortex lens that enables the synthesis of a highly tunable plasmonic vortex via the strong interaction between the illumination and the slots etched on the gold film. By adjusting the orientation of the orthogonal nanoslots pair, the metananoslots exhibit strong and controllable spin-dependent effects. The topological charge of the plasmonic vortex is found to be determined by both the incident spin and the geometrical topological charge of the metananoslots, making it suitable for applications such as optical manipulation, optical trapping, and optical data storage.

中文翻译：

---

用自旋相关的亚纳米槽产生等离子体激元涡流场

在过去的十年中，由于诸如高场增强，光学奇异性和轨道角动量等吸引人的特性，对等离激元涡旋场进行了广泛的研究。在这项工作中，我们提出了亚纳米缝隙，该纳米缝隙由成对的正交纳米缝隙组成，这些缝隙以阿基米德螺旋分布排列。亚纳米缝隙用作等离激元涡旋透镜，通过照明与金膜上蚀刻的狭缝之间的强相互作用，可以合成高度可调谐的等离激元涡旋。通过调节正交纳米缝隙对的方向，亚纳米缝隙展现出强大且可控的自旋依赖性效应。发现等离子激元的拓扑电荷由入射自旋和后纳米缝的几何拓扑电荷确定，