In this paper, broadband metasurfaces with the capability to manipulate electromagnetic waves with arbitrary polarizations are studied. Various types of metasurfaces with different geometries will be investigated. The proposed devices will be able to provide the same performance under different polarizations. Metasurface is known as metamaterials surface with ultra-thin thickness (i.e. much smaller than wavelength). Since its invention, it has attracted significant attentions due to its extraordinary light-manipulation capabilities. For example, it can introduce abrupt phase change to wavefronts that are propagating through it, leading to anomalous reflections and refractions. In the past two years, metasurfaces have been applied to areas including imaging [X. Ni et al., Nature Communications, 4: 2807, 2013], sensing, spin optics [G. Li et al., Nano Lett., 13, 4148–4151, 2012], and data storage [A. V. Kildishev et al., Science, 339, 1232009, 2013].
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机译：本文研究了能够处理任意极化电磁波的宽带超表面。将研究具有不同几何形状的各种类型的超表面。所提出的设备将能够在不同的极化条件下提供相同的性能。超表面被称为具有超薄厚度（即远小于波长）的超材料表面。自其发明以来，由于其非凡的光处理能力，它引起了广泛的关注。例如，它可能在传播通过它的波前引入突然的相变，从而导致异常的反射和折射。在过去的两年中，超颖表面已经应用于包括成像在内的领域[X. Ni et al。，Nature Communications，4：2807，2013]，传感，自旋光学[G. Li et al。，Nano Lett。，13，4148–4151，2012]和数据存储[A. V. Kildishev et al。，Science，339，1232009，2013]。
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