All-in-One Multispectral Camouflage Film: Highly Mimicking Green Vegetation Hyperspectral Features with Low Laser and...

Complementary spectral detection techniques have created a strong demand for multispectral compatible camouflage materials. Achieving broadband-compatible camouflage for hyperspectral, thermal infrared (IR), and laser detections remains a significant challenge due to the spectral conflicts and crosstalk. Here, we design and fabricate an all-dielectric multilayer film structure (MFS) utilizing a hierarchical architecture optimized by genetic algorithms. The rational design of the micronano structure effectively mimics the hyperspectral characteristics of natural vegetation. The intrinsic absorption of Ge, tailored photonic bandgap, and SiO₂ phonon polarization are employed to further suppress detectability in the laser and IR bands. By precisely manipulating surface (YbF₃/ZnS/YbF₃) interference, the film exhibits flexible color tunability, enabling adaptation to varying vegetative backgrounds. Spectral cosine value (SCV) confirms a high similarity (0.98) between the film and natural vegetation across the 0.4∼2.5 μm range. Furthermore, the structure demonstrates low reflectance (2.83%) at 1.06 μm, along with a low emissivity of 0.33 and 0.22 in 3∼5 μm and 8∼14 μm, respectively. This design strategy expands the knowledge of spectral modulation in micronano multilayer films, which is essential for their effective application in multispectral compatible camouflage systems.