Towards next-generation intelligent display devices, it is urgent to find a cheap and convenient dynamic optical control method. Conventional gratings are widely used as cheap diffractive elements due to their effective optical control capabilities. However, they are limited within multi-function or complex optical modulation due to the lack of accurate control of the amplitude/phase at pixel-level. Here, a metasurface-assisted grating-modulation system is originally proposed to achieve switchable multi-fold meta-holographic dynamics. By incorporating metasurfaces with traditional gratings and tuning their relative coupling positions, the modulation system gains the optical modulation capability to realize complex optical functionalities. Specifically, by varying the grating periods/positions relative to the metasurface, 2–8 holographic image channels are programmed to be dynamically exhibited and switched. The proposed metasurface-assisted grating-modulation approach enjoys cost-effective convenience, strong encoding freedom, and facile operation, which promises programmable optical displays, optical sensors, optical information encryption/storage, etc.

中文翻译：

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通过光栅调制实现可编程元全息动力学


面向下一代智能显示设备，迫切需要找到一种廉价、便捷的动态光学控制方法。传统光栅由于其有效的光学控制能力而被广泛用作廉价的衍射元件。然而，由于缺乏像素级幅度/相位的精确控制，它们仅限于多功能或复杂的光学调制。在这里，最初提出了超表面辅助光栅调制系统来实现可切换的多重超全息动力学。通过将超表面与传统光栅相结合并调整它们的相对耦合位置，调制系统获得了光调制能力以实现复杂的光学功能。具体来说，通过改变相对于超表面的光栅周期/位置，2-8 个全息图像通道被编程为动态展示和切换。所提出的超表面辅助光栅调制方法具有成本效益高的便利性、强大的编码自由度和简便的操作，有望应用于可编程光学显示器、光学传感器、光学信息加密/存储等。