Fig. 1. Schematic of the nested cylindrical structure of laminated rings

Fig. 2. Yee cell model

Fig. 3. Absorption，reflection，and transmission curves of metamaterial solar absorber

Fig. 4. Absorption curves of absorbers with different structures

Fig. 5. absorption curves in TE and TM modes

Fig. 6. Effects of polarization angle and incident angle on absorption spectrum

Fig. 7. Electric field distribution at different wavelengths

Fig. 8. Magnetic field distribution at different wavelengths

Fig. 9. The influence of cylinder height on the absorption rate

Fig. 10. The influence of different outer radius of rings on the absorption rate

Fig. 11. The influence of different ring thicknesses on the absorption rate

Fig. 12. The influence of different thicknesses of W metal layer on the absorption rate

Fig. 13. The influence of different SiO₂ dielectric layer thicknesses on the absorption rate

Fig. 14. The solar radiation energy on the earth's surface and the solar energy actually absorbed by the absorber

Fig. 15. The energy absorbed and the lost by the solar energy absorber