Abstract: In this article, a 3-D finite-difference time-domain (FDTD) method is proposed for rigorous modeling and fast calculation of ultralow frequency geomagnetic storm electromagnetic fields ...

光子学与电磁学领域正经历着由“数值模拟”向“智能设计” 的范式跃迁。传统依赖于经验与参数扫描的光学设计方法，在面对超表面等多自由度、高性能指标的复杂逆设计问题时，已显得效率低下且难以触及全局最优解。将FDTD电磁仿真与Python智能优化算法 ...

在大多数成像系统中，由于单个透镜无法将所有颜色聚焦，因此会使用多个折射透镜。这一问题，即所谓的“色度”，在超平面光学元件中变得更加严重。 许多科学家和工程师甚至认为超透镜具有超色差，因为所有光线无法聚焦到某一点。这限制了超平面光学 ...

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The Windows version of the Python interpreter can be run from the command line the same way it’s run in other operating systems, by typing python or python3 at the prompt. But there’s a feature unique ...

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