标题： 大面积非相干光的高效逆向设计 显示英文标题

标题： Efficient inverse design of large-area metasurfaces for incoherent light

摘要： 非相干光无处不在，但设计能够处理其随机性质的光学器件非常具有挑战性，因为直接对许多非相干入射光束进行平均可能需要大量的散射计算。 我们展示了如何通过一种互易技术来解决这个问题，从而实现了三个数量级的速度提升：只需一次麦克斯韦求解（使用任何数值技术），而不是数千次。 这一改进使我们能够进行高效的逆向设计，并对超表面进行大规模优化，以应用于光束准直器和聚光器等场景。 我们展示了入射光的角度分布对性能的影响，并特别展示了在仅分布在非零角度上的“环形”光束情况下的有前景的设计。 显示英文摘要

摘要： Incoherent light is ubiquitous, yet designing optical devices that can handle its random nature is very challenging, since directly averaging over many incoherent incident beams can require a huge number of scattering calculations. We show how to instead solve this problem with a reciprocity technique which leads to three orders of magnitude speedup: one Maxwell solve (using any numerical technique) instead of thousands. This improvement enables us to perform efficient inverse design, large scale optimization of the metasurface for applications such as light collimators and concentrators. We show the impact of the angular distribution of incident light on the resulting performance, and show especially promising designs for the case of "annular" beams distributed only over nonzero angles.