金属薄膜的动力响应理论:表面粗糙度效应

Solids Pub Date : 2023-09-18 DOI:10.3390/solids4030017
Sam Praill, Charlotte Lawton, Hasan Balable, Hai-Yao Deng
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引用次数: 0

摘要

导出了以电导率张量为唯一输入的金属薄膜动态响应函数的一般表达式。然后利用半经典模型给出了电导率张量的解析表达式,从而建立了响应函数的动力学理论。该理论的一个主要优点是它能够通过使用所谓的镜面参数来处理表面粗糙度效应。我们应用该理论研究了表面等离子体波的性质。发现表面粗糙度不影响色散,而是影响这些波的衰减率。此外,它会显著影响SPW共振所携带的谱权,当镜面参数接近于1时,该谱权向零减小。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A Theory of Dynamical Responses for Metal Films: Surface Roughness Effects
A generic expression is derived for the dynamical response function of metal films, with conductivity tensors as the only input. The semi-classical model is then used to provide an analytical expression for the conductivity tensor, thus establishing a kinetic theory for the response function. A major advantage of the theory is its ability to handle surface roughness effects through the use of the so-called specularity parameter. We applied the theory to study the properties of surface plasma waves. It is found that surface roughness does not affect the dispersion, but rather the decay rate of these waves. Furthermore, it significantly affects the spectral weight carried by the SPW resonances, which diminishes toward zero as the specularity parameter approaches unity.
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CiteScore
3.40
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