Opto-Electronic Engineering, Volume. 50, Issue 8, 230118(2023)
Broadband achromatic metasurface holography
Figures & Tables(7)
Fig. 1. Dispersion effects on imaging devices. (a) Imaging targets; (b) Holographic phase distribution; (c-e) Reconstruction images at 9 GHz, 10 GHz, and 11 GHz
Fig. 2. A broadband dispersion metasurface holographic imaging network model based on the depth image priors (DIP)
Fig. 3. Network training process. (a) The change of network training loss value with the number of iterations; (b) Numerical reconstruction image outputs by the network under different iterations
Fig. 4. Reflective cross-polarized rotational metasurface element. (a) Three-dimensional schematic diagram of the cross-polarization conversion unit; (b) Top-floor metal structure; (c) and (d) Polarization conversion efficiency and phase
Fig. 5. Electric field intensity distributions of broadband dispersion metasurface holographic imaging device at 150 mm
Fig. 6. Distributions of electric field intensity experimentally measured by a broadband dispersion metasurface holographic imaging device at 150 mm
Table 1. Structural parameters and reflected phases of different elements
View tableView in ArticleTable 1. Structural parameters and reflected phases of different elements
单元序号 开口环角度α/(°) 开口环倾斜角度β/(°) 外环半径r/mm 内环半径(r−d)/mm 相位/(°) 9 GHz 10 GHz 11 GHz 1 82 45 3.6 1.6 5.32 −60.68 112.63 2 73 45 3.6 1.6 5.79 −49.91 101.65 3 64 45 3.6 1.6 16.82 −39.63 91.43 4 157 −45 4.16 2.16 25.56 −28.75 83.46 5 157 −45 4.02 2.02 35.41 −19.46 74.09 6 157 −45 3.88 1.88 45.82 −10.04 64.85 7 157 −45 3.74 1.74 57.70 0.42 54.89 8 157 −45 3.6 1.6 70.00 11.04 45.12 9 151 −45 3.6 1.6 77.51 19.07 36.65 10 145 −45 3.6 1.6 87.76 29.59 25.60 11 138 −45 3.6 1.6 98.48 40.51 14.18 12 131 −45 3.6 1.6 107.35 49.66 4.56 13 125 −45 3.6 1.6 116.53 59.03 5.10 14 118 −45 3.6 1.6 127.03 69.80 16.11 15 112 −45 3.6 1.6 136.64 79.79 26.31 16 104 −45 3.6 1.6 147.56 91.23 38.08 17 98 −45 3.6 1.6 154.69 98.74 45.95 18 90 −45 3.6 1.6 164.79 109.25 56.89 19 82 −45 3.6 1.6 174.90 119.50 67.52 20 73 −45 3.6 1.6 174.08 130.20 78.45 21 64 −45 3.6 1.6 163.15 140.39 88.57 22 157 45 4.16 2.16 154.45 151.21 96.47 23 157 45 4.02 2.02 144.55 160.58 105.95 24 157 45 3.88 1.88 135.05 169.00 114.11 25 157 45 3.74 1.74 122.31 179.61 125.10 26 157 45 3.6 1.6 110.35 169.25 134.58 27 151 45 3.6 1.6 101.29 159.76 144.55 28 145 45 3.6 1.6 92.15 150.35 154.44 29 138 45 3.6 1.6 81.42 139.42 165.89 30 131 45 3.6 1.6 71.08 128.84 176.88 31 125 45 3.6 1.6 62.21 119.76 173.76 32 118 45 3.6 1.6 53.21 110.40 164.06 33 112 45 3.6 1.6 43.55 100.34 153.77 34 104 45 3.6 1.6 32.53 88.80 141.89 35 98 45 3.6 1.6 24.53 80.41 133.19 36 90 45 3.6 1.6 15.17 70.73 123.09
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Ruichen Li, Yijun Zou, Tianhang Chen, Bin Zheng, Tong Cai. Broadband achromatic metasurface holography[J]. Opto-Electronic Engineering, 2023, 50(8): 230118
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Category: Article
Received: May. 19, 2023
Accepted: Aug. 23, 2023
Published Online: Nov. 15, 2023
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