Role of packing density and spatial correlations in strongly scattering 3D systems
Role of packing density and spatial correlations in strongly scattering 3D systems
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DOI：
10.1364/optica.5.001037
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发表时间：
2018-09-20
期刊：
影响因子：
10.4
通讯作者：
Wiersma, Diederik S.
中科院分区：
文献类型：
--
作者：
Pattelli, Lorenzo;Egel, Amos;Wiersma, Diederik S.
在过去的世纪中，离散随机介质由于其散射光的能力而被广泛研究。即便如此，由于实验条件、探索的参数范围或样品配方不同，散射元素的三维（3D）空间分布与由此产生的不透明度之间的联系迄今为止仍然存在激烈的争论。另一方面，一个统一的数值测量与控制参数已不切实际的日期，由于纯粹的计算能力所需的地址样本具有代表性的大小。在这项工作中，我们利用图形处理单元实现的T-矩阵方法来调查的完整范围内的颗粒体积浓度和包装诱导的空间相关性，使我们能够揭示和阐明的双重作用，无论是增强或抑制不透明度的空间相关性。通过将这些发现应用于白色油漆的说明性情况，我们确定了对应于最高不透明度的密度和空间相关性的最佳组合。(C)2018年美国光学学会根据OSA开放获取出版协议的条款
Discrete random media have been investigated extensively over the past century due to their ability to scatter light. Even so, the link between the three-dimensional (3D) spatial distribution of the scattering elements and the resulting opacity is still lively debated to date due to different experimental conditions, range of parameters explored, or sample formulations. On the other hand, a unified numerical survey with controlled parameters has been impractical up to date due to the sheer computational power required to address samples with representative size. In this work, we exploit a graphics processing unit implementation of the T-matrix method to investigate the complete range of particle volume concentration and packing-induced spatial correlations, allowing us to reveal and elucidate a twofold role played by spatial correlations in either enhancing or suppressing opacity. By applying these findings to the illustrative case of white paint, we determine the optimal combination of density and spatial correlations corresponding to the highest opacity. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement