Pan Kai, Wu Xuanguang, Zhou Liang, Wei Bingyan, Li Dong, Liu Sheng, Li Peng, Yang Dexing, Zhao Jianlin, Wen Dandan
Opt Lett. 2023 Aug 15;48(16):4217-4220. doi: 10.1364/OL.499012.
Metasurface-based vectorial holography can reconstruct images with different polarization states. However, the number of polarization channels in the holographic image is relatively small in traditional methods. Here, we propose and demonstrate a metasurface vectorial hologram which carries infinite polarization channels. It can independently control the holographic pattern and polarization distribution, which can be regarded as two independent storage dimensions. We use a supercell-based metasurface to independently control the complex amplitude of the left-handed circularly polarized and right-handed circularly polarized components of the transmitted light, which then superpose in the observation plane for the vectorial pattern generation. Different from most methods, our approach does not involve complex calculations, and it is suitable for far-field design. We anticipate that it may open avenues for future applications which require arbitrary intensity and polarization control.
基于超表面的矢量全息术能够重建具有不同偏振态的图像。然而，传统方法中全息图像的偏振通道数量相对较少。在此，我们提出并展示了一种携带无限偏振通道的超表面矢量全息图。它能够独立控制全息图案和偏振分布，这可被视为两个独立的存储维度。我们使用基于超胞的超表面来独立控制透射光的左旋圆偏振和右旋圆偏振分量的复振幅，然后这些分量在观察平面上叠加以生成矢量图案。与大多数方法不同，我们的方法不涉及复杂计算，并且适用于远场设计。我们预计它可能为未来需要任意强度和偏振控制的应用开辟道路。
