Surface Plasmon Mediated Controllable Spin-Resolved Transmission in Meta-Hole Structures
Surface Plasmon Mediated Controllable Spin-Resolved Transmission in Meta-Hole Structures
复制标题
元孔结构中表面等离子体介导的可控自旋分辨传输
DOI：
10.1002/andp.201700364
复制
发表时间：
2018
影响因子：
2.4
通讯作者：
Weili Zhang
中科院分区：
文献类型：
--
作者：
Xiaoyu Xiong;Xueqian Zhang;Quan Xu;Quanlong Yang;Qiu Wang;Yuehong Xu;Huifang Zhang;Yanfeng Li;Jiaguang Han;Weili Zhang
手性响应是涉及圆偏振的光学响应。在光学操作中，灵活地控制手性响应是非常重要的。手征超材料由于其灵活的设计特点而引起了人们极大的兴趣。然而，以前的研究大多数主要是通过设计单个Meta原子的结构来实现的。同时，为了增强响应，通常需要复杂的设计和制造工艺。在这里，通过引入自旋相关的传播表面等离子体激元和自旋选择性干涉，在简单的Meta孔结构中实现了巨大的自旋分辨传输。在这个相互作用过程中，自旋-轨道角动量转换起着至关重要的作用。通过控制干涉分量之间的相位差，实现可控的自旋分辨透射。此外，这种方法也可以应用于实现表面等离子体激元的自旋分辨激发。所提出的控制策略为各种有前途的应用提供了一个通用的平台，例如偏振控制，不对称传输，表面等离子体激发和片上手性操作。
Chiral responses are optical responses involving circular polarizations. Controlling the chiral response in a flexible way is very important in optical manipulations. Chiral metamaterials have thus drawn enormous interest due to their flexible designing feature. However, most of the previous studies are mainly realized by designing the structure of the individual meta‐atom. Meanwhile, to enhance the response, complex design and fabrication processes are typically required. Here, by introducing spin‐dependent propagating surface plasmons and spin‐selective interference, giant spin‐resolved transmission is achieved in a simple meta‐hole structure. In this interaction process, spin‐orbital angular momentum conversion plays an essential role. By controlling the phase difference between the interference components, controllable spin‐resolved transmission is achieved. Furthermore, such method can also be applied to realize spin‐resolved excitation of surface plasmons. The proposed controlling strategy offers a versatile platform for a variety of promising applications, such as polarization control, asymmetric transmission, surface plasmon excitation, and on‐chip chiral manipulation.