Thickness determination with chemical identification of double-layered polymeric thin film by using multiplex CARS

被引：4

作者：

Yahng, J. S. ^{[1
]}

Jeoung, S. C. ^{[1
]}

机构：

[1] Korea Res Inst Stand & Sci, Div Ind Metrol, Taejon 305340, South Korea

来源：

OPTICS AND LASERS IN ENGINEERING | 2011年 / 49卷 / 01期

关键词：

CARS; Thickness; Polymer; Double-layered thin film; STOKES-RAMAN SCATTERING; REFRACTIVE-INDEX; MICROSCOPY; LASER; INTERFERENCE;

D O I：

10.1016/j.optlaseng.2010.08.016

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

By utilizing characteristic Coherent anti-Stokes Raman Scattering (CARS) spectra from different organic polymers of polystyrene (PS) and polymethylmethacrylate (PMMA) coated on the glass substrate, we have determined the thickness of double-layered polymer as well as their chemical identification. We have also discussed about the effects of nonlinear optical interaction between third-order optical susceptibility of neighbored polymer films on the overall CARS signal. The two polymers exhibit very close C-H vibration modes as well as refractive indices, but the dependence of each resonant CARS signal component on focal depth is successively identified with the theoretical description of CARS field. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：66 / 70

页数：5

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