We report the interference-enhanced absorption of electromagnetic radiation in two-layer lossy coatings on metal substrates. The conditions for the complete absorption of monochromatic radiation are described in comparison with those in previously studied single-layer coatings. Proof-of-principle measurements of the interference-enhanced absorption in the near-infrared range are presented for silicon-on-germanium coatings on aluminum substrates. We also provide various examples of materials that can be used to create similar light-absorbing coatings for visible and near-infrared ranges. The proposed design can be applied to optical filters, optoelectronic devices, photodetectors, and light-emitting devices.

中文翻译：

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超薄膜涂层中可见光和近红外辐射的干涉增强吸收


我们报告了金属基底上的两层有损涂层中电磁辐射的干扰增强吸收。与先前研究的单层涂层相比，描述了完全吸收单色辐射的条件。针对铝基板上的硅基锗涂层，对近红外范围内的干扰增强吸收进行了原理验证测量。我们还提供了可用于创建类似的可见光和近红外范围光吸收涂层的材料示例。所提出的设计可应用于光学滤波器、光电器件、光电探测器和发光器件。