作者
Mingbo Pu, Xiong Li, Xiaoliang Ma, Yanqin Wang, Zeyu Zhao, Changtao Wang, Chenggang Hu, Ping Gao, Cheng Huang, Haoran Ren, Xiangping Li, Fei Qin, Jing Yang, Min Gu, Minghui Hong, Xiangang Luo
发表日期
2015/10/1
期刊
Science Advances
卷号
1
期号
9
页码范围
e1500396
出版商
American Association for the Advancement of Science
简介
The catenary is the curve that a free-hanging chain assumes under its own weight, and thought to be a “true mathematical and mechanical form” in architecture by Robert Hooke in the 1670s, with nevertheless no significant phenomena observed in optics. We show that the optical catenary can serve as a unique building block of metasurfaces to produce continuous and linear phase shift covering [0, 2π], a mission that is extremely difficult if not impossible for state-of-the-art technology. Via catenary arrays, planar optical devices are designed and experimentally characterized to generate various kinds of beams carrying orbital angular momentum (OAM). These devices can operate in an ultra-broadband spectrum because the anisotropic modes associated with the spin-orbit interaction are almost independent of the incident light frequency. By combining the optical and topological characteristics, our approach would …
学术搜索中的文章
M Pu, X Li, X Ma, Y Wang, Z Zhao, C Wang, C Hu… - Science Advances, 2015