Non‐Volatile In ₃ SbTe ₂ Multispectral Responsive Emitter With Visible Color and Infrared Display‐Erasure Function

With the growing integration of wide‐spectrum detection technology, metamaterials featuring multispectrum dynamic response have emerged as an effective approach to enhance both target camouflage and noncamouflage. However, conventional response materials typically exhibit only a single‐band or static spectral response, which restricts their capacity to adapt to complex environments. Herein, a novel multispectral response emitter (MRE) composed of Al/Ge/SiO 2 /IST/ZnS is fabricated using a thin‐film evaporation deposition system, enabling visible color modulation and high/low infrared emissivity switching. The MRE can precisely match the colors of various environments, including the blue sky, ocean, yellow grassland, and green leaves, through the utilization of the thin‐film interference effect within the visible band. Meanwhile, by the rational control of the phase transition state of the IST, it can switch between high and low emissivity within two atmospheric windows (MWIR and LWIR), achieving the “display‐erasure” of infrared image. Leveraging the dual‐band collaborative response characteristics, the feasibility of encoding multilayered information on the MRE is experimentally verified. Furthermore, the MRE exhibits wide‐angle insensitivity, maintaining consistent performance over a broad range of observation angles. This work introduces new approaches for multiband dynamic spectral response and holds significant application potential, such as information encryption and thermal camouflage.