Chinese Journal of Quantum Electronics ›› 2022, Vol. 39 ›› Issue (2): 251-261.doi: 10.3969/j.issn.1007-5461.2022.02.005

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Progress in orbital angular momentum multiplexing and detection based on nano structures

OUYANG Xu1, ZHANG Mingsi1, YANG Qingshuai1, CAO Yaoyu1, XU Yi2, LI Xiangping1*   

  • Received:2021-12-01 Revised:2022-01-09 Published:2022-03-28 Online:2022-03-28

Abstract: Photon carries orbital angular momentum (OAM), which manifests as a helical phase distribution in the wavefront. Because of its unique optical field distribution and physically-unbounded OAM state, OAM beam plays an important role in super-resolution imaging, high-density data coding and other fields. The study on the new mechanisms of OAM beam-matter interaction at nano structures is expected to provide new ideas and methods for the fields of modern photonic devices and multidimensional light-matter interaction. The applications of OAM beams in multidimensional multiplexing as well as the detection technologies of OAM topological charges developed by the authors’ group are reviewed, and an outlook on the application of OAM beams at nanoscale is also presented.

Key words: information optics, orbital angular momentum, optical multiplexing, coding and decoding; perfect optical vortex, detection of vortex beam

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