超表面可被设计应用于波前的空间变换,二维周期性光学超表面结构的研究主要集中于调控光在自由空间中传播的波前。为了操控片上光信号传输的自由度,实现小尺寸、宽带以及低损耗的片上集成光子计算芯片,发展了一系列一维片上超表面的设计工作。对近几年来基于介质超表面的片上集成纳米光子器件的相关工作进行综述,从片上超表面的物理机制、片上超表面的实现方法以及片上超表面在集成纳米光子器件中的应用几方面出发进行了回顾和讨论。同时也对潜在的挑战进行了总结,对片上超表面在集成纳米光子器件中的进一步应用研究进行了展望。

Metasurfaces can be designed for the spatial transformation of wavefronts. Research on the two-dimensional periodic optical metasurfaces mainly focuses on controlling the wavefront of light propagating in free space. In recent years, researchers have designed a series of one-dimensional on-chip metasurfaces to control the degree of freedom in on-chip optical signal transmission and further realize a small-size, broadband, and low-loss integrated photonic computing chip. This article summarized the related work on on-chip nanophotonic devices based on dielectric metasurfaces. To be specific, we reviewed and discussed the physical mechanisms, implementation methods, and applications of on-chip metasurfaces in integrated nanophotonic devices. Besides, we undertook a general review of the remaining challenges and proposed possible development directions that require further study for the application of on-chip metasurfaces to integrated nanophotonic devices.