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Local field distribution in random metal-dielectric films; theory and experiment

机译:随机金属介电薄膜中的局部场分布;理论与实验

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The local field properties of metal-dielectric films are investigated in terms of the probability distribution function (PDF). For metal coverage p, close to the percolation threshold we obtain a wide, lognormal PDF which for low metal concentrations gradually transforms into a scaling, power-law distribution function. Strong enhancement of the local fields in a broad spectral range is verified by an exact numerical procedure. In experimental studies, metal-dielectric films were synthesized by a pulsed laser deposition technique, and their optical properties were investigated using near-field optical microscopy. The experimentally and numerically obtained probability functions are found to be in good agreement. (C) 2003 Elsevier B.V. All rights reserved. [References: 13]
机译:根据概率分布函数(PDF)研究了金属介电膜的局部场特性。对于金属覆盖率p,接近渗透阈值,我们获得了一个宽的对数正态PDF,对于低金属浓度,该PDF逐渐转换为缩放,幂律分布函数。精确的数值程序证实了在宽光谱范围内局部场的强增强。在实验研究中,通过脉冲激光沉积技术合成了金属电介质膜,并使用近场光学显微镜研究了它们的光学性质。实验和数字获得的概率函数被发现是很好的一致性。 (C)2003 Elsevier B.V.保留所有权利。 [参考:13]

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