Gao Yixiao, Ren Guobin, Zhu Bofeng, Liu Huaiqing, Lian Yudong, Jian Shuisheng
Opt Express. 2014 Oct 6;22(20):24322-31. doi: 10.1364/OE.22.024322.
An analytical model for plasmon modes in graphene-coated dielectric nanowire is presented. Plasmon modes could be classified by the azimuthal field distribution characterized by a phase factor exp(imφ) in the electromagnetic field expression and eigen equation of dispersion relation for plasmon modes is derived. The characteristic of plasmon modes could be tuned by changing nanowire radius, dielectric permittivity of nanowire and chemical potential of graphene. The proposed model provides a fast insight into the mode behavior of graphene-coated nanowire, which would be useful for applications based on graphene plasmonics in cylindrical waveguide.
提出了一种用于石墨烯包覆介质纳米线中等离激元模式的解析模型。等离激元模式可根据电磁场表达式中以相位因子exp(imφ)为特征的方位角场分布进行分类，并推导了等离激元模式色散关系的本征方程。通过改变纳米线半径、纳米线的介电常数和石墨烯的化学势，可以调节等离激元模式的特性。所提出的模型能够快速洞察石墨烯包覆纳米线的模式行为，这对于基于圆柱形波导中石墨烯等离子体学的应用具有重要意义。
