On-chip integrated meta-optics hold tremendous potential for optical imaging and display applications compatible with integrated photonic devices. Despite recent endeavors in multi-dimensional image display, it remains a challenge to realize dynamic holography applications with on-chip integration scheme and facile accessible tuning approach. Herein, an on-chip hydrogel-waveguiding platform with single-step fabrication is demonstrated for dynamic colorful holography. By exploiting the optical tunable property of the waveguiding hydrogel, the on-chip hydrogel metasurface enables optical concealment ON/OFF and dynamic dual-channel holographic switch within 310 ms through a simple exhalation process. Furthermore, utilizing the waveguiding hydrogel dispersion and the correlation between extraction efficiency and relative humidity, a color-mixed holographic image is encrypted and successfully exhibited at specific humidity condition. Beyond the conventional static on-chip monochromatic holography, such a dynamic on-chip hydrogel platform enjoys satisfactory humidity-responsivity, high integration capability, full-color potential, and zero-order diffraction interference-free, which suggests potential applications in active optical information concealment/encryption, full-color holography, and next-generation wearable AR devices.

中文翻译：

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用于动态多色全息的水凝胶导波片上超光学器件


片上集成超光学器件在与集成光子器件兼容的光学成像和显示应用方面具有巨大潜力。尽管最近在多维图像显示方面做出了努力，但使用片上集成方案和易于访问的调谐方法实现动态全息应用仍然是一个挑战。在此，展示了一种具有单步制造的片上水凝胶波导平台，用于动态彩色全息术。通过利用波导水凝胶的光学可调特性，片上水凝胶超表面通过简单的呼气过程在 310 毫秒内实现光学隐藏开/关和动态双通道全息切换。此外，利用波导水凝胶分散以及提取效率与相对湿度之间的相关性，对颜色混合的全息图像进行加密，并在特定湿度条件下成功显示。除了传统的静态片上单色全息技术外，这种动态片上水凝胶平台具有令人满意的湿度响应性、高集成能力、全色电位和零阶衍射无干扰性，这在主动光学信息隐藏/加密、全彩全息和下一代可穿戴 AR 设备方面具有潜在的应用前景。