Fig. 1. Spectral reflectance curves of photonic crystal at different incident angles

Fig. 2. Cross-sectional SEM image of photonic crystal sample

Fig. 3. Schematic of experimental device

Fig. 4. Attenuation curve of radar wave by photonic crystal sample

Fig. 5. Measured infrared reflectance curves of three stealth materials

Fig. 6. Schematic of testing infrared stealth characteristics

Fig. 7. Temperature line diagrams of air and wall

Fig. 8. Middle-infrared radiation temperature curves of three stealth materials measured in real time from four directions. (a) Detector is located in east or west; (b) detector is located in south or north

Fig. 9. Far-infrared radiation temperature curves of three stealth materials measured in real time from four directions. (a) Detector is located in east or west; (b) detector is located in south or north