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首页> 外文期刊>Physica, B. Condensed Matter >Study of optical properties of metallic Au-x(SiO2)(1-x) and Ni-x(SiO2)(1-x) films
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Study of optical properties of metallic Au-x(SiO2)(1-x) and Ni-x(SiO2)(1-x) films

机译:金属Au-x(SiO2)(1-x)和Ni-x(SiO2)(1-x)薄膜的光学性能研究

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摘要

To study the optical properties of the metal-insulator granular films, a series of Ni-x(SiO2)(1-x) and Au-x(SiO2)(1-x) granular films was made with a variation of x and the annealing process. The complex dielectric function was measured in the 1.5-4.8-eV photon energy range. New spectral features were found in the dielectric functions. For Au,(SiO2)(1-x) samples, a new peak in the epsilon(2) spectra is seen around 2 eV, especially for x = 0.67. The epsilon(1) spectra change continuously from positive to negative in the low photon energy range, resulting in a true zero of epsilon(1) associated with the plasmon occurring at 2.0-2.5 eV and at about 3.6 eV for the Au- and Ni-based films, respectively. Compared to previous data, the experimental results obtained in this work provide richer information to understand better the optical properties of the metal-granular films that are not well predicted by the theoretical model. The effect will be useful in the metallic multilayer structure design and applications. (C) 2000 Elsevier Science B.V. All rights reserved. [References: 12]
机译:为了研究金属绝缘体颗粒薄膜的光学特性,制作了一系列Ni-x(SiO2)(1-x)和Au-x(SiO2)(1-x)颗粒薄膜,它们的x值不同,且退火过程。在1.5-4.8-eV光子能量范围内测量了复介电函数。在介电函数中发现了新的光谱特征。对于Au,(SiO2)(1-x)样品,在2eV附近可以看到epsilon(2)光谱中的新峰,尤其是x = 0.67时。 epsilon(1)光谱在低光子能量范围内从正到负连续变化,导致与等离子激元相关的epsilon(1)的真零出现在2.0-2.5 eV处,而Au-和Ni发生在约3.6 eV电影。与以前的数据相比,这项工作中获得的实验结果提供了更丰富的信息,可以更好地理解理论模型无法很好预测的金属颗粒薄膜的光学性能。该效果将在金属多层结构设计和应用中有用。 (C)2000 Elsevier Science B.V.保留所有权利。 [参考:12]

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