Mashinsky K V, Popov V V, Fateev D V
Kotelnikov Institute of Radio Engineering and Electronics of the Russian Academy of Sciences (Saratov Branch), Saratov, Russia, 410019.
Saratov State University, Saratov, Russia, 410012.
Sci Rep. 2024 Mar 30;14(1):7546. doi: 10.1038/s41598-024-58238-w.
The excitation of terahertz plasmon modes in a graphene rectangle by normally incident linearly polarized electromagnetic wave has been theoretically studied. The complete electromagnetic approach based on formulation of the integral equations for sought-for electromagnetic quantities has been developed. The influence of edge-field effects on excitation of plasmon modes for different polarization of the incident wave and different shapes of graphene rectangle has been studied. The absorption cross-section spectra and the charge density distributions in graphene rectangle for different plasmon modes have been studied. It has been found that the edge-field effect, which results in spreading the plasmon field beyond the geometric boundaries of graphene rectangle, leads to considerable red shifts of the plasmon mode frequencies and modifies the plasmon mode dispersion.
从理论上研究了垂直入射的线偏振电磁波对石墨烯矩形中太赫兹等离激元模式的激发。基于为所求电磁量建立积分方程的完整电磁方法已被开发出来。研究了边缘场效应对于不同偏振的入射波以及不同形状的石墨烯矩形中等离激元模式激发的影响。研究了不同等离激元模式下石墨烯矩形中的吸收截面光谱和电荷密度分布。已经发现，导致等离激元场扩展到石墨烯矩形几何边界之外的边缘场效应，会导致等离激元模式频率发生相当大的红移，并改变等离激元模式色散。
