Improving photosynthesis and light capture increases crop yield and paves a sustainable way to meet the growing global food demand. Here we introduce a spectral-shifting microphotonic thin film as a greenhouse envelope that can be scalably manufactured for augmented photosynthesis. By breaking the intrinsic propagation symmetry of light, the photonic microstructures can extract 89% of the internally generated light and deliver most of that in one direction towards photosynthetic organisms. The microphotonic film augments lettuce production by more than 20% in both indoor facilities with electric lighting and in a greenhouse with natural sunlight, offering the possibility of increasing crop production efficiency in controlled environments.

改善光合作用和光捕获可提高作物产量，并为满足不断增长的全球粮食需求铺平一条可持续发展的道路。在这里，我们介绍了一种光谱偏移微光子薄膜作为温室封套，可以为增强光合作用进行可扩展制造。通过打破光固有的传播对称性，光子微结构可以提取 89% 的内部产生的光，并将大部分光沿一个方向传递给光合生物。微光子薄膜可使带电照明的室内设施和自然阳光下的生菜产量提高 20% 以上，从而有可能在受控环境中提高作物生产效率。