Fig. 1. Schematic diagram of the metasurface array and cell. (a) Main view; (b) side view; (c) top view

Fig. 2. R_yy of different metal structures

Fig. 3. Resonant current distribution. (a) 0.747 THz; (b) 1.119 THz; (c) 1.578 THz

Fig. 4. Reflection characteristics and polarization conversion characteristics. (a) Co-polarized and cross-polarized reflection coefficients; (b) PCR at different angles

Fig. 5. Schematic diagram of uv axis

Fig. 6. Co-polarized reflection coefficients under the uv axis. (a) Reflection amplitude; (b) reflection phase

Fig. 7. Cross-polarized reflection coefficients. (a) Reflection amplitude; (b) reflection phase

Fig. 8. Supercells. (a) 00; (b) 01; (c) 10; (d) 11

Fig. 9. Array layout and electric-field characteristics. (a) Array arrangement; (b) scattering pattern; (c) diffuse reflection; (d) energy diagram

Fig. 10. Scattered beams at vertical incidence for different polarized waves. (a) RCP wave; (b) LCP wave; (c) X-polarized wave; (d) Y-polarized wave

Fig. 11. Scattering characteristics of xoz surface array and metal plate. (a)(c) 0.70 THz; (b)(d) 1.05 THz

Fig. 12. RCS reduction of different polarized waves under the condition of vertical incidence

Fig. 13. RCS reduction. (a) X-polarized wave; (b) Y-polarized wave

Fig. 14. Scattering characteristics of metasurface array and metal plate at 0.8 THz frequency. (a)(c) Metasurface array and metal plate under X-polarized wave incidence; (b)(d) metasurface array and metal plate under Y-polarized wave incidence