掠射椭圆偏振谱学方法数理模型的研究

Study on Mathamatical and Physical Model of Graze Ellipsometry

掠射椭圆偏振谱学方法通过现场测量椭圆偏振参量Δ和Ψ能够反映电极过程的性质及变化规律.将电化学反应中的扩散层模型与掠射椭圆偏振实验体系相结合,提出了掠射椭圆偏振谱学方法的数理模型,对掠射椭圆偏振参量Δ和Ψ的物理化学意义做出了解释,认为电极表面附近的溶液扩散层对于椭圆偏振光既有相位延迟器的作用,又有振幅吸收器的作用;并应用一些实验结果,分析了电解液中电活性物质浓度和入射光束斑直径对掠射椭圆偏振参量的影响.

Characteristics and change rule of an electrode process can be reflected by in-situ graze ellipsometric parameters.The mathematical an d physical model of the graze ellipsometry has been put forward by combining t h e model of diffusion layer in electrochemical reaction with graze ellipso metry experiments.The physicochem ical meaning of ellipsometry parameters?and?has b een explained.The diffusion la yer near the electrode is equiva-lent to a phas e retarder and an amplit ude absorber.The influence of the co ncentration of el ectroactive substance and diameter of spot of the incidence light on?and?is di scussed with reference to experiment results.