Fig. 1. Simulated reflection intensities of the Z-PCMI and Z-PCMS. (a) Schematic diagram of the Z-PCMI. The structure parameters are set as w₁ = 115 nm, w₂ = 85 nm, L₁ = 125 nm, L₂ = 105 nm, P_x = 235 nm, and P_y = 335 nm. The thickness h of the Z-shaped PACMs is 40 nm. (b) Schematic diagram of the Z-PCMS. (c)–(f) The simulated reflection intensities and CD_R of the Z-PCMI and Z-PCMS, respectively.

Fig. 2. The distribution of the electric field of the (a), (b) Z-PCMI and (c), (d) Z-PCMS at the resonant wavelengths of 1582 nm and 578 nm under the illumination of LCP and RCP.

Fig. 3. The charge distribution of the (a), (b) Z-PCMI and (c), (d) Z-PCMS at the resonant wavelengths of 1582 nm and 578 nm under the illumination of the LCP and RCP.

Fig. 4. The influence of the refractive index n_top on CD peaks. (a), (b) The reflection CD_R and transmission CD_T intensities of the Z-PCMI for the light illuminating along –Z direction. (c), (d) The reflection CD_R and transmission CD_T intensities of the Z-PCMI for the light illuminating along +Z direction.

Fig. 5. (a), (c), (e) The reflection intensities and (b), (d), (f) transmission intensities of the Z-PCMI. The reflection and transmission intensities are obtained for the light illuminating along –Z direction.

Fig. 6. The dispersion relation of the off-diagonal elements (r_xy and r_yx) of the linear reflection coefficients. (a)–(c) The linear polarization light illuminates the Z-PCMI along –Z direction. (d)–(f) The linear polarization light illuminates the Z-PCMI along +Z direction.

Fig. 7. The reflection intensities of the G-PCMI and 卍-PCMI. (a) Schematic diagram of the G-PCMI, the structure parameters are set as W₃ = 115 nm, L₃ = 335 nm, P_x = 235 nm, and P_y = 335 nm. (b) Schematic diagram of the 卍-PCMI, the structure parameters are set as W₄ = 50 nm, L₄ = 250 nm, L₅ = 125 nm, and P_x = P_y = 450 nm. The thickness h for both of the Ag-metal-grating and the 卍-shaped structures is 40 nm. The reflection intensities of (c), (e), (g) the G-PCMI; and (d), (f) (h) the 卍-PCMI. The refractive index n_top is increased from 1 to 4, while the refractive index n_bottom keeps at 1.49.