Wide‐Angle Domain Compatible Flexible Multispectral Stealth Metasurface for Visible Light, Laser, and Microwave

As electromagnetic detection systems evolve toward multispectral integration and 0°–60° wide‐angle coverage, conventional multispectral stealth technologies suffer severe performance degradation at oblique incidence. Specifically, the 10.6 μm laser absorption peak shifts drastically at 30°, and X‐band microwave reflectivity exceeds 50% at 45°, failing stringent engineering demands. This work presents a wide‐angle‐compatible, flexible, multispectral stealth metasurface for visible light, laser, and microwave. It comprises a visible light camouflage layer (VCL), wide‐angle laser stealth layer (WLSL), and oblique‐incidence microwave absorption layer (OMAL). Large wavelength disparity across the three bands enables complete functional decoupling among layers. A resonance‐pre‐biased asymmetric Fabry–Pérot (F‐P) cavity maintains laser reflectivity below 20% at 60° incidence. A high‐duty‐cycle frequency selective surface (FSS) with double‐layer indium tin oxide (ITO) square rings eliminates the microwave transmission barrier from the WLSL, achieving > 85% absorptivity at 60°. Thin‐film interference modulates optical properties to match natural backgrounds for visible camouflage. Fabricated on PI/PC/PET flexible substrates via electron beam evaporation and laser etching, it offers conformal application potential and technical feasibility for batch manufacturing and cost optimization. This work breaks the angle‐sensitivity limitation of conventional designs and provides a feasible solution for wide‐angle multispectral stealth.