Fig. 1. Schematic of the MOPSO optimization process for the dual-band thermal

Fig. 2. Solutions obtained using MOPSO for LWIR and MWIR

Fig. 3. Geometrical parameters and emission spectra of thermal emitters in the set of optimal solutions：（a） Schematic of the optimized dual-band emitter；（b） Emission spectrum of thermal emitter A；（c） Emission spectrum of thermal emitter B；（d） Emission spectrum of thermal emitter C

Fig. 4. The electromagnetic field distributions and time-averaged power dissipation density of the dual-band thermal emitter：（a）Simulated normalized electric field intensity and（b） Simulated normalized magnetic field intensity（c）time-averaged power dissipation density at 4 μm；（d）Simulated normalized electric field intensity and（e） Simulated normalized magnetic field intensity（f）time-averaged power dissipation density at 8.2 μm

Fig. 5. Experimental characterization of the dual-band thermal emitter：（a） SEM image of part of the dual-band thermal emitter samples. An optical image of the sample is shown in the inset.（b） The theoretical（red dotted and dashed line） and experimental（black solid line） emissivity spectra of the dual-band thermal emitter samples with s polarization at 30° incident angle.（c） The measured emissivity intensity spectra in the normal direction for eleven different temperatures.（d） The measured emissivity spectra in the normal direction for four different temperatures