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Efficient orbital angular momentum vortex beam generation by generalized coding metasurface

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Abstract

A method to efficiently generate orbital angular momentum (OAM) vortex beam is proposed by introducing generalized coding metasurface (CM). Firstly, a linearly polarized (LP) cross-polarization transmission unit cell is employed as the coding element. Then, the generalized CM composed of sectorial coding elements can be considered as a bridge linking mode number of OAM and beam divergence with coding sequences. Different mode numbers OAM is generated by CMs with different coding sequences under y-polarized wave normal incidence. Both theoretical analysis and simulated results reveal that the proposed CM can achieve flexible control of the OAM vortex beam.

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Acknowledgements

The authors are grateful to the supports from the National Natural Science Foundation of China under Grant Nos. 61501503, 61471388, and 61331005, and the Natural Science Foundation of Shaanxi Province under Grant No. 2017JM6005.

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Authors and Affiliations

  1. Department of Basic Sciences, Air Force Engineering University, Xi’an, 710051, Shaanxi, China

    Qiqi Zheng, Yongfeng Li, Maochang Feng, Yongqiang Pang, Jiafu Wang, Hua Ma, Shaobo Qu & Jieqiu Zhang

  2. School of Physics and Optoelectronic Engineering, Xidian University, Xi’an, 710071, Shaanxi, China

    Yajuan Han

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  1. Qiqi Zheng
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  2. Yongfeng Li
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  3. Yajuan Han
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  4. Maochang Feng
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  6. Jiafu Wang
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  7. Hua Ma
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Correspondence to Yongfeng Li or Jieqiu Zhang.

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Zheng, Q., Li, Y., Han, Y. et al. Efficient orbital angular momentum vortex beam generation by generalized coding metasurface. Appl. Phys. A 125, 136 (2019). https://doi.org/10.1007/s00339-018-2373-z

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  • DOI: https://doi.org/10.1007/s00339-018-2373-z

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