Acta Optica Sinica, Volume. 42, Issue 2, 0226003(2022)

Modulation Mechanism of Vortex Beam by Helical Microporous Array

Yuan Gao1,2,3, Zilong Zhang1,2,3、*, Shun Tian1,2,3, Suyi Zhao1,2,3, and Changming Zhao1,2,3
Author Affiliations
  • 1School of Optics and Photonics, Beijing Institute of Technology, Beijing 100081, China
  • 2Key Laboratory of Photoelectronic Imaging Technology and System, Ministry of Education of People′s Republic of China, Beijing 100081, China
  • 3Key Laboratory of Photonics Information Technology, Ministry of Industry and Information Technology, Beijing 100081, China
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    Figures & Tables(5)
    Experimental device. (a) Diffraction device of LG beam; (b) interference device of spherical wave and diffracted beam
    Diagram of incident vortex beam and diffraction plate. (a) Intensity distribution of incident vortex beam; (b) Fermat spiral distribution with number of Fermat spirals m=6 and counterclockwise rotation; (c) Fermat spiral distribution with number of Fermat spirals m=6 and clockwise rotation; (d) Fermat spiral distribution with number of Fermat spirals m=8 and counterclockwise rotation; (e) Fermat spiral distribution with number of Fermat spirals m=8 and clockwise rotation
    Change process of diffracted beam after passing through diffraction plate with m=6 behind focal plane. (a1) Intensity distribution of whole beam calculated by simulation; (a2) intensity distribution of whole beam measured by experiment; (b1)--(b5) (e1)--(e5) intensity distribution calculated by simulation after LG beam passing through diffraction plate with counterclockwise rotation and clockwise rotation; (c1)--(c5) (f1)--(f5) phase distribution of calculated by simulation after LG beam passing through diffraction plate with counterclockwise rotation and clockwise rotation; (d1)--(d5) (g1)--(g5) intensity distribution measured by experiment after LG beam passing through diffraction plate with counterclockwise rotation and clockwise rotation
    Change process of diffracted beam after passing through diffraction plate with m=8 behind focal plane. (a) Intensity distribution of beam passing through counterclockwise diffraction plate; (b) intensity distribution of beam passing through clockwise diffraction plate
    Phase distribution of diffracted beam and its phase distribution and intensity distribution after interference with spherical wave. (a) Simulated phase distribution of diffracted beam passing through mirror 1; (b) simulated phase distribution of diffracted beam after interference with spherical wave; (c) experimental intensity distribution of diffracted beam after interference with spherical wave; (d) simulation results of OAM spectrum of diffracted beam
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    Yuan Gao, Zilong Zhang, Shun Tian, Suyi Zhao, Changming Zhao. Modulation Mechanism of Vortex Beam by Helical Microporous Array[J]. Acta Optica Sinica, 2022, 42(2): 0226003

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    Paper Information

    Category: Physical Optics

    Received: Jun. 2, 2021

    Accepted: Aug. 16, 2021

    Published Online: Dec. 29, 2021

    The Author Email: Zilong Zhang (zlzhang@bit.edu.cn)

    DOI:10.3788/AOS202242.0226003

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