Electromagnetic metasurface cloaks provide an alternative paradigm toward rendering arbitrarily shaped scatterers invisible. Most transformation-optics (TO) cloaks intrinsically need wavelength-scale volume/thickness, such that the incoming waves could have enough long paths to interact with structured meta-atoms in the cloak region and consequently restore the wavefront. Other challenges of TO cloaks include the polarization-dependent operation to avoid singular parameters of composite cloaking materials and limitations of canonical geometries, e.g., circular, elliptical, trapezoidal, and triangular shapes. Here, we report for the first time a conformal-skin metasurface carpet cloak, enabling to work under arbitrary states of polarization (SOP) at Poincaré sphere for the incident light and arbitrary conformal platform of the object to be cloaked. By exploiting the foundry three-dimensional (3D) printing techniques to fabricate judiciously designed meta-atoms on the external surface of a conformal object, the spatial distributions of intensity and polarization of its scattered lights can be reconstructed exactly the same as if the scattering wavefront were deflected from a flat ground at any SOP, concealing targets under polarization-scanning detections. Two conformal-skin carpet cloaks working for partial- and full-azimuth plane operation are respectively fabricated on trapezoid and pyramid platforms via 3D printing. Experimental results are in good agreement with numerical simulations and both demonstrate the polarization-insensitive cloaking within a desirable bandwidth. Our approach paves a deterministic and robust step forward to the realization of interfacial, free-form, and full-polarization cloaking for a realistic arbitrary-shape target in real-world applications.

电磁超表面披风为使任意形状的散射体变得不可见提供了另一种范例。大多数转换光学（TO）隐身衣本质上需要波长级的体积/厚度，这样入射波可能具有足够长的路径与隐身衣区域中的结构化亚原子相互作用，从而恢复波阵面。TO隐身衣的其他挑战包括依赖极化的操作，以避免复合隐身衣材料的奇异参数和规范几何形状的限制，例如圆形，椭圆形，梯形和三角形。在这里，我们首次报告了保形皮肤超表面地毯的隐身衣，该隐身衣可以在庞加莱球体的任意偏振状态（SOP）下工作，用于入射光和要隐蔽物体的任意保形平台。通过利用铸造厂的三维（3D）打印技术在适形物体的外表面上精心设计的亚原子，可以重建其散射光的强度和偏振的空间分布，就像散射波前一样在任何SOP上都从平坦的地面偏转，在极化扫描检测下隐藏了目标。通过3D打印，分别在梯形和金字塔形平台上制作了两个用于局部和全方位平面操作的保形地毯。实验结果与数值模拟非常吻合，并且都证明了在所需带宽内对极化不敏感的隐身现象。我们的方法为实现界面，自由形式，