Synergetic near-field reconstruction and far-field control for ultrabroad scattering in multiband camouflage based on concave reflection metasurface

With the increasing integration of multiband detection technologies, stealth materials capable of broadband spectral compatibility have become essential for enhancing target survivability and counter-detection capabilities. We fabricated a multifunctional concave reflection metasurface containing Au/GST/ZnS multilayers via femtosecond laser processing technology, which enables broadband multispectral camouflage of laser, infrared (IR), and visible bands. The gradient concave geometry contributes to the ultrabroad high scattering control across 0.8 to 14 μm by synergetic near-field reconstruction at short-wave and far-field phase gradient control at long-wave, enabling simultaneous low specular reflectance and emissivity for compatible laser and IR camouflage. Meanwhile, by rationally controlling the phase transition process of Ge2Sb2Te5, its heat dissipation channel switches from a “closed” to an “open” state at different temperatures, allowing for dynamic thermal regulation without compromising IR camouflage performance. We present a viable strategy for the design of integrated stealth metasurfaces, with potential applications in advanced camouflage, infrared signature management, and thermal regulation systems.