Fig. 1. Schematics of ultra-wideband metasurfaces. (a) LPC function description diagram; (b) top view; (c) front view

Fig. 2. Numerical simulation results when frequency range is 2.55‒7.61 THz. (a) R_xy and R_yy; (b) PCR

Fig. 3. Comparison of numerical simulation results when frequency range is 2.55‒7.61 THz. (a) Metasurface reflection coefficients with and without notch; (b) metasurface PCR with and without notch

Fig. 4. Surface current distribution for incidence of y-polarized waves. (a) f₁=2.67 THz; (b) f₂=3.48 THz; (c) f₃ =5.45 THz; (d) f₄ =7.08 THz; (e) f₅ =7.57 THz

Fig. 5. Schematics of incident and reflected waves. (a) Magnetic dipole moment; (b) electric dipole moment

Fig. 6. Effect of metasurface structure parameters on PCR. (a) t₂; (b) w₁; (c) x₁; (d) y₁

Fig. 7. Decomposition of electric field components