Wan Ting, Chen Tianhao, Bao Yang, Wang Shiyi
Department of Communication Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210003, China.
State Key Laboratory of Millimeter Waves, Nanjing 210096, China.
Micromachines (Basel). 2022 Apr 14;13(4):613. doi: 10.3390/mi13040613.
The method of moments (MoM) is an efficient electromagnetic numerical method for the accurate prediction of light scattering from plasmonic nanostructures. In practice, the light-scattering properties in different incident directions are often concerning. However, traditional MoM generally resorts to the iterative method, which suffers from the problems of convergence rate and redundant computations for multiple incident excitations. Nanoarray structures will further aggravate these problems due to a large number of unknowns. In this article, an efficient numerical method based on MoM and a hierarchical matrix (H-matrix) algorithm is proposed to solve these problems. Numerical experiments demonstrate the efficiency and accuracy of the proposed method for the prediction of light scattering from plasmonic nanoarrays in multiple directions.
矩量法（MoM）是一种用于精确预测等离子体纳米结构光散射的高效电磁数值方法。在实际应用中，不同入射方向的光散射特性常常受到关注。然而，传统的矩量法通常采用迭代方法，该方法存在收敛速度问题以及针对多个入射激励的冗余计算问题。由于存在大量未知数，纳米阵列结构会进一步加剧这些问题。在本文中，提出了一种基于矩量法和分层矩阵（H矩阵）算法的高效数值方法来解决这些问题。数值实验证明了所提方法在预测等离子体纳米阵列多方向光散射方面的效率和准确性。
