论文标题
在表面等离激元波上，在各向异性和空间分散的二维表面上，在平面分层的介质中，无限范围内的偶极子
On the surface plasmonic waves excited by a dipole above anisotropic and spatially dispersive two-dimensional surfaces of infinite extent in planarly layered media
论文作者
论文摘要
使用二氧化型绿色功能方法研究了通过各向异性和空间分散的二维表面上的垂直或水平定向的赫兹偶极子激发的表面等离子波。光谱域传输线类比绿色函数公式和等频轮廓方程。还开发了由空间域绿色功能计算产生的二维傅立叶积分的方法。为了解决具有大波数的表面等离子体波的高振荡性积分和奇异性引起的数值低效率，具有较大的波数策略，两种数值策略，将真实轴集成的外推与奇异性减法结合在一起，并提出了变形的垂直整合路径，并适用于宽范围的观察距离。为了证明所提出的配方，我们计算了偏向于漂移电流的石墨烯上方的垂直偶极子的散射场，该垂直偶极子被漂移电流偏置，该垂直电流表现出明显的空间分散剂，并表明当将其轻质物质相互作用可显着加强时，将其放置在单墨西亚的epsilon-near-near-near-Zero-Zero-Zero底物上。所提出的配方可以为二维材料和表面等离子体波的计算分析提供方法。
The surface plasmonic waves excited by a vertical or horizontal oriented Hertzian dipole above anisotropic and spatially dispersive two-dimensional surfaces of infinite extent embedded in planarly layered uniaxial media is investigated using the dyadic Green function approach. The spectral-domain transmission line analogy Green function formulation and iso-frequency contours equations are derived. The methods to accurately and efficently evaluate the two-dimensional Fourier integral arisen from the spatial-domain Green function computation are also developed. To resolve the numerical inefficiency due to the highly oscillatory integrand and singularities of surface plasmonic waves possessing large wavenumber, two numerical strategies, the extrapolation of the real-axis integration combined with singularity subtraction, and the deformed vertical integration path, are proposed and applicable to a wide range of observation distance. As a demonstration of the proposed formulation, we compute the scattered fields of a vertical dipole above the graphene biased by drift current which exhibits significant spatial dispersion and show that its light-matter interaction can be significantly reinforced when placed above uniaxially epsilon-near-zero substrates. The proposed formulation may provide methodology for the computational analysis of two-dimensional materials and surface plasmonic waves.
