Fig. 1. Schematic diagrams of dual-band PIT model: (a) Three-dimensional space schematic; (b) two-dimensional plane schematic.

Fig. 2. Transmission spectra of the sole nanodisk array, the sole nanorod array, the single-band PIT model

Fig. 3. Distribution of electric field of dual-band PIT model at (a) dip A, (b) dip B, (c) dip C, (d) peak D and (e) peak E.and the dual-band PIT model.

Fig. 4. Variation of transmission with frequency of different g.

Fig. 5. Variation of transmission with frequency of different L

Fig. 6. Schematic diagrams of four-band PIT model: (a) Three-dimensional space schematic; (b) two-dimensional plane schematic.

Fig. 7. The transmission of four-band PIT model.

Fig. 8. The comparison of transmission between two dual-band PIT models and four-band PIT model.

Fig. 9. Distribution of electric field of four-band PIT model at (a) peak A, (b) peak B, (c) peakC, (d) peak D.

Fig. 10. Variation of transmission with frequency of different L₂.

Fig. 11. Variation of transmission with frequency of different L₁.

Fig. 12. Variation of transmission with frequency of different g.

Fig. 13. The variation of transmission windows with different background materials.

Fig. 14. The variation of peak A and peak B with different background materials.

Fig. 15. The variation of peak C and peak D with different background materials.