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  • Received: Dec. 5, 2019

    Accepted: Apr. 15, 2020

    Posted: Apr. 16, 2020

    Published Online: Jun. 1, 2020

    The Author Email: Zheyu Fang (zhyfang@pku.edu.cn)

    DOI: 10.1364/PRJ.385099

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    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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Photonics Research, Vol. 8, Issue 6, 06000986 (2020)

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

Qiao Jiang1, Yanjun Bao1, Jing Li2, Lifeng Tian2, Tong Cui3, Lin Sun3, Bowen Du1, Bowen Li1, Benfeng Bai3, Jia Wang3, Hongbo Sun3, Bo Shen1,4, Han Zhang1, Feng Lin1, Xing Zhu1, and Zheyu Fang1,4,*

Author Affiliations

  • 1School 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
  • 2Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
  • 3State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instruments, Tsinghua University, Beijing 100084, China
  • 4Collaborative 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.

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