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Role of granular structure in metal layers on the optical properties of absorbing mirrors

机译:金属层中颗粒结构对吸收镜光学性能的影响

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摘要

Absorbing mirrors are optical thin film systems consisting of an absorbing metal layer held by a transparent interlayer in defined distance to a (metal) mirror layer. In the reflected light, such three-layer systems show vivid color effects due to the absorption in the metal. This absorption is modified and enhanced by interference effects. The interference condition can be tuned by the thickness of the transparent interlayer. We show by experimentation and by stratified medium model calculations the importance of a nanoscale granular structure in the absorbing metal layer for obtaining a wide spectral range of the color effect.
机译:吸收镜是一种光学薄膜系统,由吸收金属层组成,吸收金属层由透明夹层保持在与(金属)镜层的确定距离内。在反射光中,由于金属的吸收,这种三层系统显示出生动的色彩效果。这种吸收通过干涉效应得到改变和增强。干涉条件可以通过透明夹层的厚度来调节。我们通过实验和分层介质模型计算证明了吸收金属层中纳米级颗粒结构对于获得宽光谱范围的色彩效果的重要性。

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