Entropic model for the optical properties of heterogeneous media: Validation on granular gold films near percolation
Entropic model for the optical properties of heterogeneous media: Validation on granular gold films near percolation
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异质介质光学特性的熵模型：近渗透颗粒金薄膜的验证
DOI：
10.1103/physrevb.57.13227
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发表时间：
1998
影响因子：
3.7
通讯作者：
Azeddine Beghdadi
中科院分区：
文献类型：
--
作者：
C. Andraud;J. Lafait;Azeddine Beghdadi
将一种用于非均匀介质形态分析的工具，即归一化构型熵，应用于颗粒状金属薄膜的特殊形态研究。该方法允许我们确定表征图像无序的典型长度{L}o}，并且我们发展了一个非均匀介质的光学模型，该模型基于对介质的实际图像的分割，该模型很好地解释了渗流阈值附近的薄颗粒金膜的光学性质，而经典的有效介质理论在这一点失效。在使用不同算法生成的模拟图像上测试了该模型对局部形态波动的敏感性。
A tool for the morphological analysis of heterogeneous media, namely, the normalized configuration entropy, is applied to the study of the specific morphology of granular metallic thin films. The proposed method allows us to determine the typical length ${l}_{o}$ that is characteristic of the disorder of the image and we have developed an optical model for heterogeneous media, that is based on the partition of the actual image of the medium at the size ${l}_{o}.$ The model accounts well for the optical properties of thin granular gold films near the percolation threshold, where the classical effective-medium theories fail. The sensitivity of our model to local fluctuations in the morphology is tested on simulated images that are generated by using different algorithms.