物理化学学报 >> 2002, Vol. 18 >> Issue (11): 985-988.doi: 10.3866/PKU.WHXB20021105

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掠射椭圆偏振谱学方法数理模型的研究

张胜涛;谢昭明;孙大贵;陶长元;潘复生   

  1. 重庆大学化学化工学院，重庆　400044
  • 收稿日期:2002-01-29 修回日期:2002-04-20 发布日期:2002-11-15
  • 通讯作者: 张胜涛 E-mail:stzhang@cqu.edu.cn

Study on Mathamatical and Physical Model of Graze Ellipsometry

Zhang Sheng-Tao;Xie Zhao-Ming;Sun Da-Gui;Tao Chang-Yuan;Pan Fu-Sheng   

  1. College of Chemistry and Chemical Engineering, Chongqing University, Chongqing　400044
  • Received:2002-01-29 Revised:2002-04-20 Published:2002-11-15
  • Contact: Zhang Sheng-Tao E-mail:stzhang@cqu.edu.cn

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摘要： 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.

关键词: 掠射椭圆偏振技术, 电化学反应, 扩散层, 相位延迟, 振幅吸收

Abstract: Characteristics and change rule of an electrode process can be reflected by in-situ graze ellipsometric parameters. The mathematical and physical model of the graze ellipsometry has been put forward by combining the model of diffusion layer in electrochemical reaction with graze ellipsometry experiments. The physicochemical meaning of ellipsometry parameters Δ and Ψ has been explained. The diffusion layer near the electrode is equivalent to a phase retarder and an amplitude absorber. The influence of the concentration of electroactive substance and diameter of spot of the incidence light on Δ and Ψ is discussed with reference to experiment results.

Key words: Graze ellipsometry, Electrochemical reaction, Diffusion layer, Phase retarding, Amplitude absorbing