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在FDTD中实现Airy光片源,用于对不规则的Mie粒子进行散射分析

Ningning Song, Xinbo He, Bing Wei

|September 22, 2025

概括

研究人员开发了一个有限差异时间域 (FDTD) 框架,以模拟与不规则粒子相互作用的空气光板. 该工具增强了对生物光子学和光学捕获应用中的光散射的理解.

科学领域:

光子学和光学物理学的光学.
计算电磁学的计算.

背景情况:

空气光板具有独特的非衍射和自我修复特性,对光学应用非常有价值.
目前的散射研究主要使用球形粒子的分析模型,忽略了生物学中常见的不规则形状.

研究的目的:

开发一个有限差异时间域 (FDTD) 框架来模拟二维空气光片.
使用开发的FDTD模型,研究来自不规则粒子的近场光散射.

主要方法:

在FDTD框架内使用矢量角光谱方法和总场/分散场 (TF/SF) 技术构建了一个2D空气光片.
在各种条件下分析了方形和红细胞形状粒子的近场散射模式.

主要成果:

经过FDTD重建的Airy光片与理论预测密切匹配.
证明了框架能够模拟复杂,不规则的粒子几何形状的光散射.

结论:

开发的FDTD框架为研究结构光与不规则粒子相互作用提供了一种灵活的方法.
这项工作扩大了FDTD模拟在生物光子学和光学陷研究中的实用性.

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