▎ 摘　　要

This letter proposes a new approach for controlling the terahertz wavefront using simply constructed equipment, consisting of graphene-based Fabry-Perot cavities (GFPCs) arranged regularly in one dimension. The reflection spectrum of each cavity can be efficiently tailored by changing the doping level of the graphene. Specifically, more than 270 degrees, 240 degrees, and 180 degrees of phase shifts are produced near the first, second, and third resonances, respectively. With such a significant degree of freedom for the response phases, we demonstrate three different strategies to organize the array, viz., 4, 3, and 2 GFPC cells-based periodic lattices were designed, respectively, to generate particular propagating directions of the reflection waves. Compared with the metal resonant structures, our scheme is convenient for obtaining the multi-scanning angle and multi-frequency properties. The GFPC structure and the associated arrangement approach are a new addition to the wavefront control toolbox, which is promising for future innovative applications in terahertz sensing, communication, and spectrum splitting.