Fig. 1. schematic of the structure of absorption-bandwidth-tunable MPA

Fig. 2. Refractive index and extinction coefficient of Au

Fig. 3. Refractive index and extinction coefficient of VO₂ at different temperatures

Fig. 4. Detailed settings of the FDTD simulation

Fig. 5. Absorption as a function of wavelength of MPA at different temperature

Fig. 6. Electric field distribution of MPA at the different resonance wavelength（T=25°C）

Fig. 7. The magnetic field distribution of MPA at the different resonance wavelength（T=25°C）

Fig. 8. The electromagnetic field distribution of MPA at resonance wavelength（T=80°C）

Fig. 9. The influence of MPA structural parameters on the absorption spectrum of MPA（T=25°C）

Fig. 10. The influence of MPA structural parameters on the absorption spectrum of MPA（T=80°C）

Fig. 11. The influence of FP cavity wdith w on the FP cavity equivalent refractive index n_eff