Fig. 1. Absorber structure. (a) Array structure; (b) unit side view

Fig. 2. Absorption characteristics of rectangular multilayer absorber. (a) Absorption curves of absorbers with different structures; (b) absorption spectra of MSSA structures at different polarization angles

Fig. 3. Distribution of |E| and E_zreal at different wavelengths. (a) 730 nm; (b) 1165 nm; (c) 2005 nm; (d) 3295 nm

Fig. 4. Distribution of |H| at different wavelengths. (a) 730 nm; (b) 1165 nm; (c) 2005 nm; (d) 3295 nm

Fig. 5. Performance curves of different metal materials. (a) Absorption rate; (b) structural impedance

Fig. 6. Performance curves of different non-metallic materials. (a) Absorption rate; (b) average absorption rate

Fig. 7. Influence of different parameters on absorption performance of absorber and its average absorption rate. (a) P; (b) w₁; (c) w₂; (d) h₁; (e) h₂

Fig. 8. Influence of incident angle on absorber absorption rate under different polarization modes. TM mode (a) absorption spectrum, (c) absorption curves; TE mode (b) absorption spectrum, (d) absorption curves