Chinese Optics Letters, Volume. 22, Issue 5, 050502(2024)
Bi-layered coded metasurface for multi-functional hologram with broadband transmission and efficient reflection
Figures & Tables(7)
Fig. 1. (a) Schematic diagram of the proposed five-function full-space metasurface. (b) Schematic diagram of the coding element, where perspective, top and bottom views are shown.
Fig. 2. Amplitude and phase characteristics of the coding unit cell. (a) Cross-polarized transmission amplitude and phase under the x-polarized wave incidence. (b), (c) Co-polarized reflection amplitude and phase under the x- and y-polarized wave incidences, respectively, for operation at 11.7 GHz. (d), (e) Co-polarized reflection amplitude and phase under the x- and y-polarized wave incidences, respectively, for operation at 15.4 GHz. The values of m, n, a1, and a2 are given in mm.
Fig. 3. Current distributions on the top and bottom layers of the unit cell. (a) At 8 GHz under x-polarized incidence. (b) At 11.7 GHz under y-polarized incidence. (c) At 11.7 GHz under x-polarized incidence. (d) At 15.4 GHz under y-polarized incidence. (e) At 15.4 GHz under x-polarized incidence.
Fig. 4. (a) Coding map of cross-polarized channel in transmission mode. (b) Theoretical calculation result of the holographic image. Simulation results of imaging at (c) 4.7 GHz, (d) 6 GHz, (e) 8 GHz, and (f) 10.4 GHz.
Fig. 5. Phase coding map, theoretical calculation results and simulation results of the different images in the reflection semi-space. (a) “J” hologram. (b) Vertical bifocal image. (c) “T” hologram. (d) Horizontal bifocal image.
Fig. 6. (a) Photographs of the front and back faces of the fabricated metasurface sample. (b) Illustration of the experimental setup used to scan the electric field in the imaging plane. (c) Measured results in transmission mode at 4.7 GHz, 6 GHz, 8 GHz, and 10.4 GHz. Measured results in reflection mode (d) at 11.7 GHz under x-polarized incidence, (e) at 15.4 GHz under x-polarized incidence, (f) at 11.7 GHz under y-polarized incidence, and (g) at 15.4 GHz under y-polarized incidence.
Table 1. Detailed Structural Parameters Corresponding to the Encoding Units of the Metasurface
View tableView in ArticleTable 1. Detailed Structural Parameters Corresponding to the Encoding Units of the Metasurface
pol pol 0/0 11.7 GHz/15.4 GHz 0/1 11.7 GHz/15.4 GHz 1/0 11.7 GHz/15.4 GHz 1/1 11.7 GHz/15.4 GHz 0/0/0 4.4–10.4 GHz/11.7 GHz/15.4 GHz θ = 0° θ = 0° θ = 0° θ = 0° m = 1.2 mm m = 1.2 mm m = 1.2 mm m = 1.2 mm a1 = 3.1 mm a1 = 3.1 mm a1 = 3.1 mm a1 = 3.1 mm n = 1.2 mm n = 1.2 mm n = 0.8 mm n = 0.8 mm a2 = 3.1 mm a2 = 2 mm a2 = 3.1 mm a2 = 2 mm 0/0/1 4.4–10.4 GHz/11.7 GHz/15.4 GHz θ = 0° θ = 0° θ = 0° θ = 0° m = 1.2 mm m = 1.2 mm m = 1.2 mm m = 1.2 mm a1 = 2 mm a1 = 2 mm a1 = 2 mm a1 = 2 mm n = 1.2 mm n = 1.2 mm n = 0.8 mm n = 0.8 mm a2 = 3.1 mm a2 = 2 mm a2 = 3.1 mm a2 = 2 mm 0/1/0 4.4–10.4 GHz/11.7 GHz/15.4 GHz θ = 0° θ = 0° θ = 0° θ = 0° m = 0.8 mm m = 0.8 mm m = 0.8 mm m = 0.8 mm a1 = 3.1 mm a1 = 3.1 mm a1 = 3.1 mm a1 = 3.1 mm n = 1.2 mm n = 1.2 mm n = 0.8 mm n = 0.8 mm a2 = 3.1 mm a2 = 2 mm a2 = 3.1 mm a2 = 2 mm 0/1/1 4.4–10.4 GHz/11.7 GHz/15.4 GHz θ = 0° θ = 0° θ = 0° θ = 0° m = 0.8 mm m = 0.8 mm m = 0.8 mm m = 0.8 mm a1 = 2 mm a1 = 2 mm a1 = 2 mm a1 = 2 mm n = 1.2 mm n = 1.2 mm n = 0.8 mm n = 0.8 mm a2 = 3.1 mm a2 = 2 mm a2 = 3.1 mm a2 = 2 mm 1/0/0 4.4–10.4 GHz/11.7 GHz/15.4 GHz θ = 90° θ = 90° θ = 90° θ = 90° m = 1.2 mm m = 1.2 mm m = 1.2 mm m = 1.2 mm a1 = 3.1 mm a1 = 3.1 mm a1 = 3.1 mm a1 = 3.1 mm n = 1.2 mm n = 1.2 mm n = 0.8 mm n = 0.8 mm a2 = 3.1 mm a2 = 2 mm a2 = 3.1 mm a2 = 2 mm 1/0/1 4.4–10.4 GHz/11.7 GHz/15.4 GHz θ = 90° θ = 90° θ = 90° θ = 90° m = 1.2 mm m = 1.2 mm m = 1.2 mm m = 1.2 mm a1 = 2 mm a1 = 2 mm a1 = 2 mm a1 = 2 mm n = 1.2 mm n = 1.2 mm n = 0.8 mm n = 0.8 mm a2 = 3.1 mm a2 = 2 mm a2 = 3.1 mm a2 = 2 mm 1/1/0 4.4–10.4 GHz/11.7 GHz/15.4 GHz θ = 90° θ = 90° θ = 90° θ = 90° m = 0.8 mm m = 0.8 mm m = 0.8 mm m = 0.8 mm a1 = 3.1 mm a1 = 3.1 mm a1 = 3.1 mm a1 = 3.1 mm n = 1.2 mm n = 1.2 mm n = 0.8 mm n = 0.8 mm a2 = 3.1 mm a2 = 2 mm a2 = 3.1 mm a2 = 2 mm 1/1/1 4.4–10.4 GHz/11.7 GHz/15.4 GHz θ = 90° θ = 90° θ = 90° θ = 90° m = 0.8 mm m = 0.8 mm m = 0.8 mm m = 0.8 mm a1 = 2 mm a1 = 2 mm a1 = 2 mm a1 = 2 mm n = 1.2 mm n = 1.2 mm n = 0.8 mm n = 0.8 mm a2 = 3.1 mm a2 = 2 mm a2 = 3.1 mm a2 = 2 mm
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Lei Zhu, Xusheng Li, Liang Dong, Wenjing Xie, Guanyu Shang, Shah Nawaz Burokur, Xumin Ding, "Bi-layered coded metasurface for multi-functional hologram with broadband transmission and efficient reflection," Chin. Opt. Lett. 22, 050502 (2024)
Paper Information
Category: Diffraction, Gratings, and Holography
Received: Nov. 27, 2023
Accepted: Jan. 26, 2024
Published Online: May. 20, 2024
The Author Email: Lei Zhu (zhulei@qqhru.edu.cn), Shah Nawaz Burokur (sburokur@parisnanterre.fr), Xumin Ding (xuminding@hit.edu.cn)
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