Reconstruction of light profiles with amplitude and phase information, called holography, is an attractive optical technology with various significant applications such as three-dimensional imaging and optical data storage. Subwavelength spatial control of both amplitude and phase of light is an essential requirement for an ideal hologram. However, traditional holographic devices suffer from their restricted capabilities of incomplete modulation in both amplitude and phase of visible light; this results in sacrifice of optical information and undesirable occurrences of critical noises in holographic images. Herein, we have proposed a novel metasurface that is capable of completely controlling both the amplitude and phase profiles of visible light independently with subwavelength spatial resolution. The full, continuous, and broadband control of both amplitude and phase was achieved using X-shaped meta-atoms based on the expanded concept of the Pancharatnam-Berry phase. The first experimental demonstrations of the complete complex-amplitude holograms with subwavelength definition at visible wavelengths were achieved, and excellent performances with a remarkable signal-to-noise ratio as compared to those of traditional phase-only holograms were obtained. Extraordinary control capability with versatile advantages of our metasurface paves a way to an ideal holography, which is expected to be a significant advancement in the field of optical holography and metasurfaces.

中文翻译：

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使用宽带全息超表面对光进行完全的振幅和相位控制†

具有幅度和相位信息的光轮廓重建，称为全息术，是一种有吸引力的光学技术，具有各种重要的应用，例如三维成像和光学数据存储。光的振幅和相位的亚波长空间控制是理想全息图的基本要求。然而，传统的全息照相设备受其在可见光的幅度和相位上不完全调制的局限性的困扰。这导致牺牲了光学信息，并且在全息图像中不希望出现临界噪声。本文中，我们提出了一种新颖的超颖表面，该超颖表面能够完全独立于亚波长空间分辨率来完全控制可见光的幅度和相位分布。完整，连续，基于Pancharatnam-Berry相的扩展概念，使用X形的亚原子实现了振幅和相位的宽带控制。获得了在可见波长处具有亚波长定义的完整复振幅全息图的第一批实验演示，并且与传统的仅相位全息图相比，获得了具有显着信噪比的出色性能。超卓的控制能力以及我们超颖表面的广泛优势为理想的全息照相铺平了道路，这有望成为光学全息和超颖表面领域的重大进步。获得了在可见波长处具有亚波长定义的完整复振幅全息图的第一批实验演示，并且与传统的仅相位全息图相比，获得了具有显着信噪比的出色性能。超卓的控制能力以及我们超颖表面的广泛优势为理想的全息照相铺平了道路，这有望成为光学全息和超颖表面领域的重大进步。获得了在可见波长处具有亚波长定义的完整复振幅全息图的第一批实验演示，并且与传统的仅相位全息图相比，获得了具有显着信噪比的出色性能。超卓的控制能力以及我们超颖表面的广泛优势为理想的全息照相铺平了道路，这有望成为光学全息和超颖表面领域的重大进步。