Fig. 1. Structural diagrams of unit of infrared absorber. (a) 3D view; (b) top view

Fig. 2. Dielectric constant versus wavelength. (a) Dielectric constant of TiO₂; (b) dielectric constant of LiF; (c) real part of dielectric constant of VO₂; (d) imaginary part of dielectric constant of VO₂

Fig. 3. Dependence of absorptivity on wavelength and azimuth angle when incidence angle is 0. (a) Absorptivity versus wavelength; (b) dependence of absorptivity on wavelength and azimuth angle

Fig. 4. Dependence of absorptivity on wavelength and incident angle and magnetic field distribution on XY section of top layer. (a)(c) TM wave; (b)(d) TE wave

Fig. 5. Magnetic and electric field distributions in different planes at four absorption peaks. (a)(d) In XY plane at top of structure;(b)(e) in XZ plane at center of structure; (c)(f) in YZ plane at center of structure

Fig. 6. Relative impedance of absorber versus wavelength

Fig. 7. Absorptivity curves and corresponding magnetic field distributions under different structural parameters. (a) p; (b) w; (c) h₂; (d) h₃; (e) h₄; (f) a; (g) b; (h) c

Fig. 8. Effect of conductivity of VO₂ on absorption spectrum

Fig. 9. Absorption curves at 80 °C and 25 °C

Fig. 10. Comparison of absorption effects of absorbers with different structures when incident light is TE wave