论文标题
光散射在两个平行的亚波长圆柱上
Light Scattering on Two Parallel Subwavelength Cylinders
论文作者
论文摘要
等离子体共振发现了在各种系统中的重要应用，例如纳米antennas，太阳能电池板，折射率传感器。不幸的是，已知一些针对此类系统的分析解决方案。该作品旨在找到通过平面电磁波在两个平行缸上散射的解决方案。当它们的直径及其之间的间隙小于辐射波长时，准近似值是有效的。我们建立了一个保形转换，将笛卡尔映射到双极正交坐标中，并代表散射场作为拉普拉斯操作员特征函数的分解。显示近场强度分布与Comsol多物理学执行的数值计算相吻合。 Green获得的功能也可以找到更高的分解顺序。与以前的研究相比，我们处理具有不同直径和介电常数的圆柱体的一般情况。
The plasmon resonance has found important application in various systems, e.g., nanoantennas, solar panels, refractive index sensors. Unfortunately, a few analytical solutions for such systems are known. The work aims to find a solution for scattering by a plane electromagnetic wave on two parallel cylinders. When their diameters and the gap between them are less than the radiation wavelength, the quasistatic approximation is valid. We build up a conformal transformation that maps Cartesian into bipolar orthogonal coordinates and represent the scattered field as a decomposition by eigenfunctions of the Laplace operator. The near-field intensity distribution is shown to coincide with numerical calculation performed by COMSOL Multiphysics. Green's function obtained allows one to find also higher decomposition orders. Compared to previous studies, we treat the general case of cylinders with different diameters and dielectric constants.
