▎ 摘　　要

Compared with previous graphene-based optical modulators that can be tuned electrically with the Fermi level, all-optical modulators have attracted much attention due to their ultrafast and broadband response (bandwidth approximate to 200GHz). To take advantage of hybrid plasmonic waveguides (HPWs) and the nonlinear response of graphene, we proposed all-optical absorption and phase modulators at the wavelength of 1.55 mu m and E-F=0.1eV. The modulators consist of two different geometries, graphene on an HPW and graphene on a double-slot HPW. Compared with the previous graphene-based all-optical modulators, our design has a short-effective waveguide length and higher modulation depth. This was achieved through the incomparable integration of HPW optics and graphene photonics that can be used to design chip-scale, compact, and high-efficiency all-optical modulators.