Phase gradient metasurface structure for visible-infrared-laser compatible stealth camouflage

With the rapid advancement of detection technologies, the demand for multispectral stealth capabilities covering multiple bands has become increasingly critical. This paper proposes a phase-modulation-based metal-dielectric metasurface designed to achieve compatible camouflage across visible (380-780 nm), infrared (3-14 μm), and laser-detectable wavebands (8-14 μm). Within the infrared atmospheric windows, the structure exhibits remarkably low average emissivity (ε_3-5μm = 0.09 and ε_8-14μm = 0.15), demonstrating superior thermal stealth performance. The metasurface maintains low reflectivity over a wide angular range in the 8-14 μm band (R < 0.2 in 0-45°), contributing to effective laser stealth. Furthermore, by depositing zinc sulfide (ZnS) films with varying thicknesses onto the metasurface, the visible reflectance spectrum is precisely engineered to emulate background coloration, enabling high-fidelity visible camouflage. This study successfully addresses the persistent challenge of spectral coupling and regulation conflicts in multispectral stealth, offering a viable strategy for wide-angle, broadband compatible camouflage with promising applications in military defense.