▎ 摘　　要

Graphene is a two-dimensional material with outstanding properties such as high electronic and thermal conductivities that may bring a revolution in the miniaturization of electronic and optical circuits. In this letter, we analyze a tunable grating structure that combines a graphene grating and a vertical silica grating based upon a pseudonoise function. We show that the properties of the compound grating can be tailored by applying an external voltage to the graphene grating.