In this paper, we propose a novel graphene-dielectric hybrid plasmonic waveguide (GDHPW). The fundamental hybrid mode characteristics guided by the GDHPW are numerically investigated. The results show ultra-small mode area (~10⁻⁴λ²) and long propagation length (tens of micrometers) can be simultaneously realized by tuning the key geometric structure parameters and the chemical potential of graphene. In addition, we also analyze the crosstalk properties about the two GDHPWs placed on a substrate and ultralow crosstalk can be achieved. Moreover, several alternative modified structures with remarkable optical confinement performances are proposed. The GDHPW with strong optical confinement is expected to serve as a fundamental building block for various tunable high-density integrated photonic components and devices.

在本文中，我们提出了一种新型的石墨烯-电介质混合等离子体波导（GDHPW）。数值研究了GDHPW指导的基本混合模式特性。结果显示超小模场面积（〜10 ^-4 λ ²通过调整关键的几何结构参数和石墨烯的化学势，可以同时实现较长的传播长度（数十微米）。此外，我们还分析了放置在基板上的两个GDHPW的串扰特性，可以实现超低串扰。此外，提出了具有显着的光学限制性能的几种替代的修改结构。具有强大光学限制的GDHPW有望成为各种可调谐高密度集成光子组件和设备的基本构建块。