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Transmission of visible light through oxidized copper films: feasibility of using a spectral projected gradient method

机译:可见光通过氧化铜膜的透射:使用光谱投影梯度法的可行性

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Transmittance measurements at normal incidence were carried out over the visible spectral range for metallic thin films deposited by electron beam evaporation on thick glass substrates. The presence of an inhomogeneous thin layer of Cu_(2)O covering the deposited Cu films is required for a satisfactory model of the measurements taken from various samples with increasing thickness. A spectral projected gradient method is used to invert the transmission spectra from which the wavelength dependence of the effective dielectric function of the oxidized coating layer is obtained. Then an effective medium model is used to estimate the volume fraction of internal voids randomly distributed through the surface layer.
机译:在通过电子束蒸发沉积在厚玻璃基板上的金属薄膜的可见光谱范围内,对法向入射的透射率进行了测量。对于覆盖厚度不断增加的各种样品而言,要获得令人满意的测量模型,就需要存在覆盖沉积的Cu膜的Cu_(2)O不均匀薄层。使用光谱投影梯度法来反转透射光谱,由此获得氧化涂层的有效介电功能的波长依赖性。然后,使用有效的介质模型来估计随机分布在表层的内部空隙的体积分数。

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