Perturbative approach to the calculation of the electric field near a metal surface
Perturbative approach to the calculation of the electric field near a metal surface
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计算金属表面附近电场的微扰方法
DOI：
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发表时间：
1979
期刊：
影响因子：
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通讯作者：
A. Rajagopal
中科院分区：
文献类型：
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作者：
A. Bagchi;R. Barrera;A. Rajagopal
本文发展了一种系统的微扰法，用于计算电磁辐射入射到金属表面时，金属表面附近的电场。文中详细地讨论了这种方法，特别是对于金属的“无微扰模型”的简单选择。渐近形式的电场分量的表达式被用来获得修正菲涅尔公式的反射率为$s$和$p$偏振光。表面修正椭偏参数也来自。将这些结果与以前的理论结果联系起来。该程序被施加到金属表面的化学吸附杂质，并示出导致一个新的和有用的表达式的差分反射率的情况下，$p$偏振光。结果进行了讨论，其效用在研究表面反射光谱的实验数据。
A systematic perturbational procedure is developed for the calculation of the electric field near a metal surface when electromagnetic radiation is incident upon it. The method is worked out in detail for a particularly simple choice of the "unperturbed model" for the metal. Asymptotic forms of the expression for the electric-field components are used to obtain corrections to the Fresnel formulas for the reflectivity for both $s$- and $p$-polarized light. Surface corrections to ellipsometric parameters are also derived. Connection is made between these results and those of previous theories. The procedure is applied to a metal surface with chemisorbed impurities, and is shown to lead to a new and useful expression for the differential reflectance in the case of $p$-polarized light. The result is discussed in terms of its utility in studying experimental data on surface-reflectance spectroscopy.