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<p>A direct optimal calculation method was proposed to determine the thickness, refractive index, and extinction coefficient of thin films solely from experimental transmittance data. Unlike conventional approaches, this method does not rely on any dispersion model. Numerical and experimental analyses confirm its accuracy. The variations in refractive index and extinction coefficient curves demonstrate the chemical bond properties of chalcogenide films. This work provides a useful method for analyzing the optical parameters of the optical films.</p>

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Direct optimal calculation method for obtaining the thickness and complex refractive index of chalcogenide glass films

  • 期刊论文

  • 发表日期：

    2025年7月21日

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  • Yue Zhang,
  • Yao Zhou,
  • Yinghao Cao,
  • Jianxing Zhao,
  • Rui Hong,
  • Jiaxuan Ren,
  • Gong Zhang,
  • Shigeng Song,
  • Chonge Wang,
  • Yinglin Song,
  • Jianhong Zhou

摘要

A direct optimal calculation method was proposed to determine the thickness, refractive index, and extinction coefficient of thin films solely from experimental transmittance data. Unlike conventional approaches, this method does not rely on any dispersion model. Numerical and experimental analyses confirm its accuracy. The variations in refractive index and extinction coefficient curves demonstrate the chemical bond properties of chalcogenide films. This work provides a useful method for analyzing the optical parameters of the optical films.