SMUTHI is a python package for the efficient and accurate simulation of electromagnetic scattering by one or multiple wavelength-scale objects in a planarly layered medium. The software combines the T-matrix method for individual particle scattering with the scattering matrix formalism for the propagation of the electromagnetic field through the planar interfaces. In this article, we briefly introduce the relevant theoretical concepts and present the main features of SMUTHI. Simulation results obtained for several benchmark configurations are validated against commercial software solutions. Owing to the generality of planarly layered geometries and the availability of different particle shapes and light sources, possible applications of SMUTHI include the study of discrete random media, meta-surfaces, photonic crystals and glasses, perforated membranes and plasmonic systems, to name a few relevant examples at visible and near-visible wavelengths.

SMUTHI 是一个 python 包，用于在平面分层介质中有效和准确地模拟一个或多个波长尺度对象的电磁散射。该软件将用于单个粒子散射的 T 矩阵方法与用于电磁场通过平面界面传播的散射矩阵形式化相结合。在本文中，我们简要介绍了相关的理论概念，并介绍了 SMUTHI 的主要特点。针对多个基准配置获得的仿真结果针对商业软件解决方案进行了验证。由于平面分层几何的通用性以及不同粒子形状和光源的可用性，SMUTHI 的可能应用包括研究离散随机介质、超表面、光子晶体和玻璃，