Photonics Research, Volume. 8, Issue 7, 1148(2020)

Polarization-independent highly efficient generation of Airy optical beams with dielectric metasurfaces On the Cover

Binbin Yu1、†, Jing Wen1,4、†,*, Lei Chen1, Leihong Zhang1, Yulong Fan2, Bo Dai1, Saima Kanwal1, Dangyuan Lei2, and Dawei Zhang1,3,5、*
Author Affiliations
  • 1Engineering Research Center of Optical Instrument and Systems, Ministry of Education and Shanghai Key Laboratory of Modern Optical System, University of Shanghai for Science and Technology, Shanghai 200093, China
  • 2Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong, China
  • 3Shanghai Institute of Intelligent Science and Technology, Tongji University, Shanghai 200092, China
  • 4e-mail: jwen@usst.edu.cn
  • 5e-mail: dwzhang@usst.edu.cn
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    Figures & Tables(10)
    Geometrical model for generating Airy optical beams with a metasurface.
    (a) Schematic side and (b) top views of an amorphous silicon nanopillar unit with height H, diameter D, and lattice constant P on an SiO2 substrate; (c) the dielectric metasurface, composed of the above silicon nanopillars with spatially varied diameters, is imposed by a 3/2 phase for Airy optical beam generation operating under transmission mode in the near-infrared (NIR) region. Experimentally measured longitudinal and transverse field distributions at different vertical planes are superimposed on top of the metasurface.
    (a) Simulated phase and (b) transmission intensity of an array of silicon nanopillars as a function of their diameter D. The lattice constant of the array is P=620 nm, and the height of the pillars is H=600 nm.
    (a) A 3/2 phase pattern imposed on the metasurface; (b) simulated longitudinal field distribution profiles of the generated Airy optical beam from the position of z=50 μm to z=105 μm along the beam deflection direction; (c)–(f) simulated transverse field distribution profiles in the xy planes at z=70 μm, 80 μm, 90 μm, and 100 μm away from the metasurface.
    (a) Top and (b) zoomed view SEM images of the fabricated metasurface sample; (c) schematic diagram of optical characterization setup.
    (a)–(f) Simulated and (g)–(l) experimental transverse xy field patterns at the position of z=87 μm when the incident beam is LP with a polarization angle of (a), (g) 0° and (b), (h) 45°, (c), (i) left circularly polarized (LCP), (d), (j) right circularly polarized (RCP), EP with an ellipticity of (e), (k) −0.5 and (f), (l) 0.5, respectively.
    Experimentally measured FWHM of the main lobe of each Airy beam along its propagation trajectory when the incident beam is LP with a polarized angle of 0° and 45°, LCP, RCP, and EP with an ellipticity of −0.5 and 0.5, respectively.
    (a)–(f) Simulated and (g)–(l) experimental longitudinal field distribution profiles of the Airy beams in the yz plane at vertical positions from z=30 μm to z=100 μm when the incident beam is LP with a polarized angle of (a), (g) 0° and (b), (h) 45°, (c), (i) LCP, (d), (j) RCP, and EP with an ellipticity of (e), (k) −0.5 and (f), (l) 0.5, respectively.
    (a) Simulated longitudinal field distribution profiles of the Airy beam. A sphere obstacle with a diameter of 20 μm is placed at (x,z)=(−4.1,60) μm. (b) Experimental longitudinal field distribution profiles of the Airy beam. The yellow dashed lines show the position of the thin plastic film with a microink droplet placed at z=63 μm from the metasurface.
    • Table 1. Summary of Our Result and Other References

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      Table 1. Summary of Our Result and Other References

      ReferencesEfficiency (%)MaterialWavelengthIncident Light
      Our result56Silicon1550 nmPolarization-insensitive
      [61]70–85 (simulation result, no experiment)Silicon1500 nmPolarization-insensitive
      [72]Silver633 nmPolarization-insensitive
      [56]Gold2000 nmCP light
      [60]Gold780 nmCP light
      [70]63Silicon600–695 nmCP light
      [71]65–75Titanium dioxide430 nmCP light
      [55]13.5 (λ=800  nm), 4.2(λ=976  nm)Gold800–1100 nmLP light
      [57]100 (theoretical result)Aluminum21.74 mmLP light
      [58]Aluminum400 μm, 750 μmLP light
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    Binbin Yu, Jing Wen, Lei Chen, Leihong Zhang, Yulong Fan, Bo Dai, Saima Kanwal, Dangyuan Lei, Dawei Zhang. Polarization-independent highly efficient generation of Airy optical beams with dielectric metasurfaces[J]. Photonics Research, 2020, 8(7): 1148

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    Paper Information

    Category: Surface Optics and Plasmonics

    Received: Feb. 11, 2020

    Accepted: May. 18, 2020

    Published Online: Jun. 11, 2020

    The Author Email: Jing Wen (jwen@usst.edu.cn), Dawei Zhang (dwzhang@usst.edu.cn)

    DOI:10.1364/PRJ.390202

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