Yu Haohai, Zhang Huaijin, Wang Yicheng, Han Shuo, Yang Haifang, Xu Xiangang, Wang Zhengping, Petrov V, Wang Jiyang
State Key Laboratory of Crystal Materials and Institute of Crystal Materials, Shandong University, Jinan 250100, China.
Sci Rep. 2013 Nov 12;3:3191. doi: 10.1038/srep03191.
We demonstrate the optical orbital angular momentum conservation during the transfer process from subwavelength plasmonic vortex lens (PVLs) to light and the generating process of surface plasmon polaritons (SPPs). Illuminating plasmonic vortex lenses with beams carrying optical orbital angular momentum, the SP vortices with orbital angular momentum were generated and inherit the optical angular momentum of light beams and PVLs. The angular momentum of twisting SP electromagnetic field is tunable by the twisted metal/dielectric interfaces of PVLs and angular momentum of illuminating singular light. This work may open the door for several possible applications of SP vortices in subwavelength region.
我们展示了在从亚波长表面等离子体涡旋透镜（PVL）到光的转换过程以及表面等离激元极化激元（SPP）的产生过程中光学轨道角动量的守恒。用携带光学轨道角动量的光束照射表面等离子体涡旋透镜，产生了具有轨道角动量的表面等离激元涡旋，其继承了光束和表面等离子体涡旋透镜的光学角动量。扭曲的表面等离激元电磁场的角动量可通过表面等离子体涡旋透镜的扭曲金属/电介质界面以及照射奇异光的角动量进行调节。这项工作可能为表面等离激元涡旋在亚波长区域的多种潜在应用打开大门。
Zotero 插件
