Abstract
The multi-focus metalens can couple the light into multiple channels in optical interconnections, which is beneficial to the development of planar, miniaturized, and integrated components. We propose broadband photonic spin Hall effect (PSHE) driven multi-focus metalenses, in which each nanobrick plays a positive role for all focal points. Three PSHE driven metalenses with four, six, and eight focal points have been designed and investigated, respectively. Under the incidences of left-/right-handed circularly polarized (LCP/RCP) light, these metalenses can generate regularly distributed two, three, and four RCP/LCP focal points, respectively. The uniformity of the focusing intensity has been investigated in detail by designing an additional four six-focus metalenses with different focus distributions. The uniqueness of these metalenses makes this design philosophy very attractive for applications in spin photonics, compact polarization detection, multi-imaging systems, and information processing systems.
© 2023 Optica Publishing Group
Full Article | PDF ArticleMore Like This
Wei Wang, Qingyuan Yang, Shan He, Yan Shi, Xiangmin Liu, Jinghua Sun, Kai Guo, Lulu Wang, and Zhongyi Guo
Opt. Express 29(26) 43270-43279 (2021)
Bingshuang Yao, Xiaofei Zang, Yang Zhu, Dahai Yu, Jingya Xie, Lin Chen, Sen Han, Yiming Zhu, and Songlin Zhuang
Photon. Res. 9(6) 1019-1032 (2021)
Junwei Xu, Ximin Tian, Zhi-Yuan Li, Kun Xu, Pei Ding, Zhanjun Yu, and Yinxiao Du
Opt. Mater. Express 12(3) 918-930 (2022)