Flexible multiband stealth metasurface compatible with visible-laser-infrared-microwave spectra

In response to multispectral detection threats and functional conflicts or complex structures in existing stealth materials, this paper proposes a flexible multiband stealth metasurface compatible with visible-laser-infrared (IR)-microwave spectra. The “three functional layers” architecture—optical camouflage layer (OCL), IR functional layer (IRFL), and microwave functional layer (MFL)—achieves multiband stealth via layered design and process optimization. OCL uses SiO 2 / ZnS film interference to match visible light colors. IRFL employs an asymmetric Fabry–Pérot structure based on ultrathin Ag tunneling and surface plasmon polaritons, achieving more than 90% absorption of 1.06 μm laser and maintaining emissivity below 10% at 2–14 μm. MFL forms a frequency selective surface by etching OCL and IRFL to enable the transmission of 2–14 GHz electromagnetic waves. Combined with the underlying indium–tin–oxide wave-absorbing structure, it achieves 90% absorption in the X-band. The overall structure, with a thickness of less than 5 mm, exhibits a certain degree of flexibility and visible transparency, adopting mature processes such as electron beam evaporation and laser etching, which are low-cost and suitable for mass production. The designed metasurface realizes multiband stealth with a simple structure, high functional integration, and easy engineering implementation, demonstrating broad application potential in multiband compatible stealth fields.