In this paper, we present a flexible, breathable and optically transparent metasurface with ultra-wideband absorption. The designed double layer of indium tin oxide (ITO) films with specific carved structure realizes absorption and electromagnetic (EM) isolation in dual-polarization, as well as good air permeability. Under the illumination of x- and y-polarization incidence, the metasurface has low reflectivity and transmission from about 2 to 18 GHz. By employing ITO film based on polyethylene terephthalate (PET), the presented metasurface also processes the excellent flexibility and optically transparency, which can be utilized for wearable device application. In addition, the dual-layer design enables mechanically-reconfigurable property of the metasurface. The transmission and reflection coefficients in two polarizations show distinct difference when arranging the different relevant positions of two layers of the metasurface. A sample with 14*14 elements is designed, fabricated and measured, showing good agreement with the simulation results. We envision this work has various potentials in the wearable costume which demands both EM absorption and isolation.

中文翻译：

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基于可重构和柔性氧化铟锡薄膜的光学透明超表面吸收剂

在本文中，我们提出了具有超宽带吸收能力的灵活，透气和光学透明的超颖表面。设计的双层氧化铟锡（ITO）薄膜具有特定的雕刻结构，可实现双极化的吸收和电磁（EM）隔离，并具有良好的透气性。在x和y极化入射的照明下，超颖表面的反射率较低，并且在大约2至18 GHz的范围内具有透射率。通过使用基于聚对苯二甲酸乙二酯（PET）的ITO膜，所提供的超颖表面还具有出色的柔韧性和光学透明性，可用于可穿戴设备。此外，双层设计可实现超颖表面的机械可重新配置特性。当布置超颖表面的两层的不同相关位置时，两种极化的透射系数和反射系数表现出明显的差异。设计，制作和测量了一个具有14 * 14元素的样本，显示出与模拟结果良好的一致性。我们认为这项工作在可穿戴服装中具有多种潜力，需要电磁吸收和隔离。