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Broadband visible-light absorber via hybridization of propagating surface plasmon

机译：传播表面等离子体激元杂交的宽带可见光吸收剂

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摘要

We demonstrate a broadband visible-light absorber based on excitation of multiple propagating surface plasmon (PSP) resonances. The simple structure is constructed of continuous gold/silicamulti-layers covered by a one-dimensional gold grating. The broadening of bandwidth arises from the inter-layer hybridization and spectral super position of PSPs, which is predicted with the analytical coupled oscillator model and validated using the RCWA simulation. The average absorption increases with the number of gold/ silica pairs and exceeds 95% over the whole visible spectrum when only five pairs are included. Moreover, results show that the absorption can be further enhanced by grading the thickness of silica layers. The presented design might enable promising applications in the fields of photovoltaic cells and thermal emitters, owing to its advantages of wideband, near-unity absorption and simple fabrication simultaneously. (C) 2016 Optical Society of America
机译：我们演示了基于多个传播表面等离子体激元（PSP）共振激发的宽带可见光吸收器。简单的结构由一维金光栅覆盖的连续金/二氧化硅多层构成。 PSP的层间杂交和频谱超位置产生了带宽的扩展，这是通过分析耦合振荡器模型进行预测并使用RCWA仿真进行验证的。当仅包含五对时，平均吸收随金/二氧化硅对的数量而增加，并且在整个可见光谱中超过95％。而且，结果表明，通过分级二氧化硅层的厚度可以进一步增强吸收。由于它的宽带，近统一吸收和同时制造简单的优点，因此提出的设计可能在光伏电池和热发射器领域实现有希望的应用。 （C）2016美国眼镜学会

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