• Infrared and Laser Engineering
  • Vol. 52, Issue 2, 20220304 (2023)
Yingwei Su and Zhen Tian
Author Affiliations
  • Center for Terahertz Waves and School of Precision Instrument and Optoelectronics Engineering, Key Laboratory of Optoelectronic Information Technology (Ministry of Education of China), Tianjin University, Tianjin 300072, China
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    DOI: 10.3788/IRLA20220304 Cite this Article
    Yingwei Su, Zhen Tian. High-efficiency terahertz wave anomalous reflector based on dielectric metasurface of phase gradient grating[J]. Infrared and Laser Engineering, 2023, 52(2): 20220304 Copy Citation Text show less
    Schematic of the anomalous reflection on metasurface with three diffraction orders
    Fig. 1. Schematic of the anomalous reflection on metasurface with three diffraction orders
    (a) Schematic of unit cell of dielectric grating; (b) Dielectric metasurface for anomalous reflection
    Fig. 2. (a) Schematic of unit cell of dielectric grating; (b) Dielectric metasurface for anomalous reflection
    Reflectivity and phase response verses the duty ratio of metagrating at 0.96 THz
    Fig. 3. Reflectivity and phase response verses the duty ratio of metagrating at 0.96 THz
    (a) Simulation results of anomalous reflection efficiency; (b) Electric field of anomalous reflection above the metasurface (X-Z plane); (c) Power flow around the metasurface; (d) Anomalous reflection efficiency when the duty ratio of the first grating is scanned
    Fig. 4. (a) Simulation results of anomalous reflection efficiency; (b) Electric field of anomalous reflection above the metasurface (X-Z plane); (c) Power flow around the metasurface; (d) Anomalous reflection efficiency when the duty ratio of the first grating is scanned
    (a) Schematic of polarization-independent two dimensional metasurface; (b) Electric field of anomalous reflection above the two dimensional metasurface (X-Z plane); (c) Efficiency of TE mode and TM mode; (d) Anomalous reflection efficiency comparison between our design (blue) and the generalized Snell's law-based linear phase gradient profile design (red)
    Fig. 5. (a) Schematic of polarization-independent two dimensional metasurface; (b) Electric field of anomalous reflection above the two dimensional metasurface (X-Z plane); (c) Efficiency of TE mode and TM mode; (d) Anomalous reflection efficiency comparison between our design (blue) and the generalized Snell's law-based linear phase gradient profile design (red)
    (a) Electric field anomalous reflection above the metasurface when incident angle is 5°; (b) Anomalous reflection efficiency comparison between our design (blue) and the generalized Snell's law-based linear phase gradient profile design (red) when incident angle changes from 0° to 20°
    Fig. 6. (a) Electric field anomalous reflection above the metasurface when incident angle is 5°; (b) Anomalous reflection efficiency comparison between our design (blue) and the generalized Snell's law-based linear phase gradient profile design (red) when incident angle changes from 0° to 20°
    Yingwei Su, Zhen Tian. High-efficiency terahertz wave anomalous reflector based on dielectric metasurface of phase gradient grating[J]. Infrared and Laser Engineering, 2023, 52(2): 20220304
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