The ability to manipulate light and liquids on integrated optofluidics chips has spurred a myriad of important developments in biology, medicine, chemistry and display technologies. Here we show how the convergence of optofluidics and metasurface optics can lead to conceptually new platforms for the dynamic control of light fields. We first demonstrate metasurface building blocks that display an extreme sensitivity in their scattering properties to their dielectric environment. These blocks are then used to create metasurface-based flat optics inside microfluidic channels where liquids with different refractive indices can be directed to manipulate their optical behaviour. We demonstrate the intensity and spectral tuning of metasurface colour pixels as well as on-demand optical elements. We finally demonstrate automated control in an integrated meta-optofluidic platform to open up new display functions. Combined with large-scale microfluidic integration, our dynamic-metasurface flat-optics platform could open up the possibility of dynamic display, imaging, holography and sensing applications.

在集成光流控芯片上操纵光和液体的能力已经刺激了生物学、医学、化学和显示技术的无数重要发展。在这里，我们展示了光流控和超表面光学的融合如何在概念上为光场的动态控制带来新的平台。我们首先展示了超表面构建块，这些构建块在其散射特性对其介电环境中表现出极高的敏感性。然后使用这些块在微流体通道内创建基于超表面的平面光学器件，在这些通道中可以引导具有不同折射率的液体来操纵它们的光学行为。我们展示了超表面彩色像素以及按需光学元件的强度和光谱调谐。我们最终在集成元光流控平台中展示了自动控制，以开辟新的显示功能。结合大规模微流体集成，我们的动态超表面平面光学平台可以开辟动态显示、成像、全息术和传感应用的可能性。