Wang, LeiKruk, SergeyKoshelev, KirillKravchenko, Ivan ILuther-Davies, BarryKivshar, Yuri2019-04-17May 13-18978-1-943580-42-2http://hdl.handle.net/1885/160399We demonstrate Si-based metasurfaces for third-harmonic generation of an arbitrary wavefront. The nonlinear metasurfaces produce phase gradients within a full 0--2π phase range. We achieve 92% diffraction efficiency of the nonlinear wavefront control.The authors acknowledge a financial support from the Australian Research Councilapplication/pdfen-AU© OSA 2018201810.1364/CLEO_SI.2018.SM4D.62023-01-08