设计了一种介质加载石墨烯等离子体波导，研究了不同结构尺寸的波导模场分布及传输特性。仿真结果表明，当石墨烯的化学势为0.7 eV、波导脊宽度和脊高度均为1000 nm时，介质加载石墨烯等离子体波导的模式宽度达到最小值1.55 μm，传播长度达到43.47 mm。该介质加载石墨烯等离子体波导不仅可以满足波导设计的要求，也为纳米器件的长距离传输提供了可能。

A dielectric-loaded graphene plasma waveguide is proposed and the mode field distributions and propagation characteristics of the waveguides with different sizes are studied. The simulation results show that, when the chemical potential of graphene is 0.7 eV, and the ridge width and the ridge height are both 1000 nm, the mode width of dielectric-loaded graphene plasma waveguide reaches the minimum value of 1.55 μm and the propagation length reaches 43.47 mm. This dielectric-loaded graphene plasma waveguide not only can meet the requirement of waveguide design, but also provides a possibility of long-distance transmission for nano-devices.