为了实现光学系统的集成和小型化，提高光学系统的成像质量，设计了一种基于广义斯涅尔定律和几何相位的平面超透镜。通过在超透镜界面处设计双曲面相位分布，将入射圆偏振平面波阵面转换为球形波阵面，将光聚焦在期望焦距处，并且在垂直入射时能够实现衍射极限聚焦。分析了入射光以不同角度入射时，光斑的调制传递函数(MTF)曲线，阐述了不同角度入射光入射时导致MTF曲线下降的原因。该分析对平面超透镜的进一步优化设计具有一定的指导意义，有助于实现小型化、集成化的光学系统。

Airy optical beams have emerged to hold enormous theoretical and experimental research interest due to their outstanding characteristics. Conventional approaches suffer from bulky and costly systems, as well as poor phase discretization. The newly developed metasurface-based Airy beam generators have constraints of polarization dependence or limited generation efficiency. Here, we experimentally demonstrate a polarization-independent silicon dielectric metasurface for generation of high-efficiency Airy optical beams. In our implementation, rather than synchronous manipulation of the amplitude and phase by plasmonic or Huygens’ metasurfaces, we employ and impose a 3/2 phase-only manipulation to the dielectric metasurface, consisting of an array of silicon nanopillars with an optimized transmission efficiency as high as 97%. The resultant Airy optical beams possess extraordinarily large deflection angles and relatively narrow beam widths. Our validated scheme will open up a fascinating doorway to broaden the application scenarios of Airy optical beams on ultracompact photonic platforms.