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Morphology-dependent resonances of spherical droplets with numerous microscopic inclusions

机译:具有大量微观夹杂物的球形液滴的形态学依赖共振

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We use the recently extended superposition T-matrix method to study the behavior of a sharp Lorenz-Mie resonance upon filling a spherical micrometer-sized droplet with tens and hundreds of randomly positioned microscopic inclusions. We show that as the number of inclusions increases, the extinction cross-section peak and the sharp asymmetry-parameter minimum become suppressed, widen, and move toward smaller droplet size parameters, while ratios of diagonal elements of the scattering matrix exhibit sharp angular features indicative of a distinctly nonspherical particle. Our results highlight the limitedness of the concept of an effective refractive index of an inhomogeneous spherical particle.
机译:我们使用最近扩展的叠加T矩阵方法来研究用数十个和数百个随机放置的微观夹杂物填充球形微米大小的液滴后的尖锐的Lorenz-Mie共振行为。我们表明,随着夹杂物数量的增加,消光截面峰和最小的不对称参数最小值变得受到抑制,加宽并朝着更小的液滴尺寸参数移动,而散射矩阵的对角元素比率显示出尖锐的角度特征,表明明显是非球形的粒子。我们的结果突显了非均匀球形颗粒的有效折射率概念的局限性。

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