• Opto-Electronic Engineering
  • Vol. 49, Issue 4, 220011 (2022)
Jin Wu, Fei Qin*, and Xiangping Li
Author Affiliations
  • Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Institute of Photonics Technology, Jinan University, Guangzhou, Guangdong 511443, China
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    DOI: 10.12086/oee.2022.220011 Cite this Article
    Jin Wu, Fei Qin, Xiangping Li. Atomically thin Fresnel zone plate with broadband focusing property[J]. Opto-Electronic Engineering, 2022, 49(4): 220011 Copy Citation Text show less
    Schematical shown of the loss-assisted phase shift mechanism. (a) The structure configuration used in our work; (b) FDTD simulation result of the π phase shift come from the monolayer MoS2 sheet
    Fig. 1. Schematical shown of the loss-assisted phase shift mechanism. (a) The structure configuration used in our work; (b) FDTD simulation result of the π phase shift come from the monolayer MoS2 sheet
    (a) The optical image; (b) SEM image; (c) Raman mapping image of the atomical thin Fresnel zone plate fabricated by laser scribing technique
    Fig. 2. (a) The optical image; (b) SEM image; (c) Raman mapping image of the atomical thin Fresnel zone plate fabricated by laser scribing technique
    Schematic diagram of the optical characterization system
    Fig. 3. Schematic diagram of the optical characterization system
    The focusing property in 535 nm wavelength of the monolayer Fresnel zone plate. (a) Experimental measured intensity distribution in the focal plane of z=43 μm; (b) Intensity line profile of the focal spot; (c) The experimental measured intensity distribution along the propagation distance in the region between z=30 μm and z=50 μm
    Fig. 4. The focusing property in 535 nm wavelength of the monolayer Fresnel zone plate. (a) Experimental measured intensity distribution in the focal plane of z=43 μm; (b) Intensity line profile of the focal spot; (c) The experimental measured intensity distribution along the propagation distance in the region between z=30 μm and z=50 μm
    Broadband response of the phase modulation property of the 2D MoS2 sheet. (a) The real and imaginary parts of the refractive index of the MoS2 sheet; (b) The dependence of phase modulation property with the thickness of MoS2 sheet. The shadow region represents the phase modulation region above 0.2π
    Fig. 5. Broadband response of the phase modulation property of the 2D MoS2 sheet. (a) The real and imaginary parts of the refractive index of the MoS2 sheet; (b) The dependence of phase modulation property with the thickness of MoS2 sheet. The shadow region represents the phase modulation region above 0.2π
    Simulation results of the broadband focusing properties. (a) Intensity profile along the optical axis for the wavelength region from 415 nm to 635 nm; (b) The dependence between the focal spot size with working wavelength
    Fig. 6. Simulation results of the broadband focusing properties. (a) Intensity profile along the optical axis for the wavelength region from 415 nm to 635 nm; (b) The dependence between the focal spot size with working wavelength
    Measured broadband focusing property of the atomic thin planar diffractive lens. Scalebar: 1000 nm
    Fig. 7. Measured broadband focusing property of the atomic thin planar diffractive lens. Scalebar: 1000 nm
    Zone Nos.Inner radius of rm /μm Outer radius of rm /μm
    10.004.80
    26.808.35
    39.6510.81
    411.8612.83
    513.7314.59
    615.4016.18
    716.9217.64
    818.3319.05
    Table 1. Parameters of the atomic thin Fresnel zone plate
    Jin Wu, Fei Qin, Xiangping Li. Atomically thin Fresnel zone plate with broadband focusing property[J]. Opto-Electronic Engineering, 2022, 49(4): 220011
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