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Spectral interferometric technique to measure the ellipsometric phase of a thin-film structure

机译:光谱干涉技术测量薄膜结构的椭圆偏振相位

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摘要

A two-step white-light spectral interferometric technique is used to retrieve the ellipsometric phase of anthin-film structure from the spectral interferograms recorded in a polarimetry configuration with a birefrin-ngent crystal. In the first step, the phase difference between p- and s-polarized waves propagating in thencrystal alone is retrieved. In the second step, the additional phase change that the polarized waves undergonon reflection from the thin-film structure is retrieved. The new method is used in determining the thin-filmnthickness from ellipsometric phase measured for SiO2 thin film on a Si substrate in a range fromn550 to 900 nm. The thicknesses of three different samples obtained are compared with those resulting fromnpolarimetric measurements, and good agreement is confirmed. © 2009 Optical Society of America
机译:使用两步白光光谱干涉技术,从以双折射-晶体结晶的偏振光谱中记录的光谱干涉图中检索蒽菲林膜结构的椭圆偏振相位。在第一步中,仅在晶体中传播的p极化波和s极化波之间的相位差就可以得到。在第二步中,获取偏振波未从薄膜结构反射的附加相变。该新方法用于根据椭圆偏振法确定的薄厚度,该厚度是在550nm至900nm范围内的Si衬底上测量SiO2薄膜的厚度。将获得的三个不同样品的厚度与通过极化测量得到的厚度进行比较,并确认了良好的一致性。 ©2009美国眼镜学会

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  • 来源
    《Optics Letters》 |2009年第17期|p.2661-2663|共3页
  • 作者单位

    Department of Physics, Technical University Ostrava, 17 Listopadu 15, 708 33 Ostrava-Poruba, Czech Republic* Corresponding author: petr.hlubina@vsb.cz;

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