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光的线性极化程度在一个不规则形状的单个大粒子的背散射时

Natalia Kustova, Alexander Konoshonkin, Anatoli Borovoi

|October 13, 2023

概括

来自不规则粒子的光反射显示出由于连贯效应而导致的极化激增. 这种激增的标志取决于粒子形状,这挑战了在单粒子反散射中总是观察到负极化这一观念.

科学领域:

光学和光子学在光学和光子学.
散射理论散射理论
计算物理计算物理

背景情况:

粒子的光散射对于理解大气光学,遥感和材料科学至关重要.
随机定向的粒子的连贯反向散射通常会导致负极化现象.
粒子形状对反向散射中极化效应的影响需要进一步研究.

研究的目的:

通过物理光学近似来研究来自大型,随机定向,不规则形状的粒子的光反射.
分析极化激增现象及其对粒子形态学的依赖.
要确定常规负极化是否是单粒子反散射的强制性特征.

主要方法:

使用物理光学近似 (PhOA) 来计算光背散射.
分析了线性极化程度,以确定极化波动.
研究了光子轨迹形状在确定极化激增的标志中的作用.

主要成果:

线性偏振的程度揭示了归因于连贯反向散射的偏振激增.
极化激增的信号可以是正的或负的,这取决于占主导地位的光子轨迹.
证明负极化现象对单个反射粒子不必存在.

结论:

光子轨迹的形状显著影响着反向散射中的极化激增信号.
不规则的粒子形状可以导致正极化波浪,偏离传统观测.
这项研究扩大了对非球形粒子光散射中的极化效应的理解.

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