EXCITATION OF NONRADIATIVE SURFACE PLASMA WAVES IN SILVER BY METHOD OF FRUSTRATED TOTAL REFLECTION
EXCITATION OF NONRADIATIVE SURFACE PLASMA WAVES IN SILVER BY METHOD OF FRUSTRATED TOTAL REFLECTION
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DOI：
10.1007/bf01391532
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发表时间：
1968-01-01
影响因子：
--
通讯作者：
OTTO, A
中科院分区：
文献类型：
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作者：
OTTO, A
描述了一种在光滑表面上激发非辐射表面等离子体波（SPW）的新方法，该方法也引起全反射的新现象。由于金属真空表面上的 SPW 的相速度小于真空中的光速，因此，只要表面完全光滑，这些波就不能被撞击表面的光激发。但是，如果将棱镜靠近金属真空界面，则 SPW 可以被全反射中存在的倏逝波光学激发。激发被视为横向磁光和特定入射角的反射的强烈减少。该方法可以准确评估这些波的色散。将银真空表面的实验结果与金属光学理论进行比较，发现在光学常数误差范围内一致。
A new method of exciting nonradiative surface plasma waves (SPW) on smooth surfaces, causing also a new phenomena in total reflexion, is described. Since the phase velocity of the SPW at a metal-vacuum surface is smaller than the velocity of light in vacuum, these waves cannot be excited by light striking the surface, provided that this is perfectly smooth.However, if a prism is brought near to the metal vacuum-interface, the SPW can be excited optically by the evanescent wave present in total reflection. The excitation is seen as a strong decrease in reflection for the transverse magnetic light and for a special angle of incidence. The method allows of an accurate evaluation of the dispersion of these waves. The experimental results on a silver-vacuum surface are compared with the theory of metal optics and are found to agree within the errors of the optical constants.