Degenerate long range surface modes, supported on thin nickel films
Degenerate long range surface modes, supported on thin nickel films
复制标题
简并长程表面模式，由镍薄膜支持
DOI：
10.1016/0030-4018(96)00334-3
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发表时间：
1996
影响因子：
2.4
通讯作者：
["E. Wood
中科院分区：
文献类型：
--
作者：
["E. Wood
在这项工作中，islandised镍膜已被放置在一个对称的环境中，允许通过衰减全反射的远程表面模式的光激发。建模理论的实验角度相关的反射率数据的比较表明，它是不可能确定的薄镍层的光学介电常数，而不知道其厚度。反射率数据具有一组简并拟合;当绘制为Cole-Cole图时，针对该简并度的推导出的光学折射率描述了一个圆。这个圆是从忽略耦合棱镜的分析三介质理论中天真地预测出来的。进一步的研究表明，简并圆是在长程模附近拟合反射率曲线的一般结果。
In this work islandised nickel films have been placed in a symmetric environment to allow optical excitation of long-range surface modes via attenuated total reflection. Comparison of modelling theory to the experimental angle-dependent reflectivity data shows that it is not possible to determine the optical permittivity of the thin nickel layer without knowledge of its thickness. The reflectivity data has a set of degenerate fits; the deduced optical permittivities for this degeneracy describing a circle when plotted as a Cole-Cole plot. This circle is naively predicted from an analytical three-media theory which ignores the coupling prism. Moreover, further investigations show that the degenerate circle is a general result of fitting reflectivity curves in the vicinity of a long range mode.