Multispectral Shared‐Aperture Metasurface With RF Wide‐Angle and Polarization Stability for Tri‐Band Transmission and High‐Fidelity Imaging

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The integration of multispectral, efficient, and stable radio‐frequency (RF) transmission and high‐fidelity imaging within a single optical window represents a critical yet challenging goal for low‐altitude aircraft (LAA) electro‐optical pods. Here, this paper proposes an optically transparent multispectral shared‐aperture metasurface (OMSM) with RF wide‐angle and polarization stability, which leverages a novel two‐dimensional spatially independent control strategy to overcome the aforementioned limitation. The unique mechanism unlocks superior dual‐mode optical and RF cross‐spectral performance. Design results demonstrate that it maintains high transmission efficiency across three bands (1 dB at 2–3 & 5–6 GHz and 1.5 dB at 3.8–4.1 GHz) and stable in‐band interference suppression (average 10 dB) within the 2–6 GHz spectrum. A minimal and independent set of low‐duty‐cycle RF modulating units works synergistically to deliver high transmittance across the visible (VIS) and near‐infrared (NIR) spectrum ( 94% at 380–1800 nm) with low imaging distortion. The prototype was fabricated using a large‐area low‐cost reproducible process, and the measured results show excellent agreement with the numerical simulations. This work provides a viable and easily implementable paradigm for designing cross‐spectrum cooperative devices.