Photonics Research, 2020, 8 (6): 06000986, Published Online: Jun. 1, 2020  

Bi-channel near- and far-field optical vortex generator based on a single plasmonic metasurface Download: 810次

Author Affiliations
1 School of Physics, State Key Laboratory for Mesoscopic Physics, Academy for Advanced Interdisciplinary Studies, and Nano-optoelectronics Frontier Center of Ministry of Education, Peking University, Beijing 100871, China
2 Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
3 State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instruments, Tsinghua University, Beijing 100084, China
4 Collaborative Innovation Center of Quantum Matter, Beijing, China
Abstract
With the recent development of the metasurface, generating an optical vortex in optical far or near fields is realized in various ways. However, to generate vortices in both the near and far fields simultaneously is still a challenge, which has great potential in the future compact and versatile photonic system. Here, a bi-channel optical vortex generator in both the near and far fields is proposed and demonstrated within a single metasurface, where the surface plasmon vortex and the far-field optical vortex can be simultaneously generated under circularly polarized light. The ability of generating vortices with arbitrary topological charges is experimentally demonstrated, which agrees well with simulations. This approach provides great freedom to integrate different vortex generators in a single device, and offers new opportunities for integrated optical communications, trapping, and other related fields.

Qiao Jiang, Yanjun Bao, Jing Li, Lifeng Tian, Tong Cui, Lin Sun, Bowen Du, Bowen Li, Benfeng Bai, Jia Wang, Hongbo Sun, Bo Shen, Han Zhang, Feng Lin, Xing Zhu, Zheyu Fang. Bi-channel near- and far-field optical vortex generator based on a single plasmonic metasurface[J]. Photonics Research, 2020, 8(6): 06000986.

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