Graphene plasmons (GPs) have opened new perspectives for nanophotonic applications due to their intense fields and low losses at certain frequencies. In this work, we investigate transverse magnetic or p-polarized plasmonic modes supported by a doped graphene sheet cladded between a dielectric and a nanocomposite material in tera Hertz regimes. We show that if there is a certain mechanism to excite and couple localized surface plasmons (LSPs) on the surfaces of the metal-nanoparticles to GPs, this coupling leads to higher wave vectors for the GPs, which gives significant wave localization and intense fields near the surface. Along with dispersion relation, we discuss different properties of GPs supported by the waveguide geometry and its interaction with LSPs. Moreover, we compare the results with GPs supported by dielectric/graphene/dielectric geometry and discuss their tunability with different controlling parameters. We adopt realistic parameters to describe the geometry, therefore the study can be realized experimentally.

石墨烯等离子体（GPs）由于其强场和某些频率下的低损耗，为纳米光子应用开辟了新的前景。在这项工作中，我们研究了横向磁或 p 极化等离子体模式，该模式由包覆在电介质和纳米复合材料之间的掺杂石墨烯片支持，在太赫兹范围内。我们表明，如果存在某种机制来激发金属纳米粒子表面上的局域表面等离子体 (LSP) 并将其耦合到 GP，则这种耦合会导致 GP 的波矢量更高，从而在附近产生显着的波定位和强场。表面。除了色散关系，我们还讨论了波导几何支持的 GP 的不同特性及其与 LSP 的相互作用。而且，我们将结果与电介质/石墨烯/电介质几何支持的 GP 进行比较，并讨论它们在不同控制参数下的可调性。我们采用现实的参数来描述几何，因此研究可以通过实验来实现。