发表机构
University of Maryland, Baltimore County; NASA Goddard Space Flight Center; Center for Research and Exploration in Space Science and Technology, NASA/GSFC（马里兰大学巴尔的摩县分校; 美国宇航局戈达德太空飞行中心; NASA/GSFC空间科学与技术研究探索中心）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文提出动态缩放局部补丁方法，将光束传播分为粗网格镜面场与细网格散射场，对单个粒子动态应用高分辨率补丁，以高效模拟小粒子对大光束的散射效应，避免内存溢出。
AI 中文摘要
在光学中，以高空间分辨率模拟大光束的传播是一个常见挑战，这既源于计算时间的需求，也源于内存的需求。虽然计算时间对可模拟的内容设定了实际限制，但内存资源是绝对的硬性限制。本文中，我们报告了一种新方法，以克服光束与需要建模的相对较小的光学扰动（如由颗粒污染引起的扰动）之间的空间尺度差距。该方法将整个传播链分为两条路径：在粗网格上进行镜面场传播，在细网格上进行散射场传播。特别是对于后者，我们动态地对单个粒子应用高分辨率局部补丁。该方法不仅限于颗粒污染，还适用于光束传播路径上的任何微小不连续结构，而不会触发内存溢出。
英文摘要
Simulating the propagation of a large beam with high spatial resolution is a common challenge in optics due to both computational time and memory demands. While computational time sets a practical limit on what one can simulate, memory resources are an absolute hard limit. In this paper, we report a novel method to overcome a gap in spatial scale between the beam and the relatively small optical disturbance that needs to be modeled, such as those due to particulate contamination. The method splits the entire propagation chain into to two paths: a specular field propagation on coarse grids and scattered fields on fine grids. Especially for the latter, we dynamically apply high-resolution local patches for individual particles. Not limited to particulate contamination, this method is applicable to any tiny discontinuous structures on the beam propagation path without memory overflow triggered.
