Broadband visible-light absorber via hybridization of propagating surface plasmon
Broadband visible-light absorber via hybridization of propagating surface plasmon
复制标题
通过传播表面等离子体杂化的宽带可见光吸收剂
DOI：
10.1364/ol.41.001965
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发表时间：
2016-05-01
期刊：
影响因子：
3.6
通讯作者：
Ren, Naifei
中科院分区：
文献类型：
--
作者：
Cong, Jiawei;Zhou, Zhiqiang;Ren, Naifei
我们展示了一种基于多传播表面等离子激元(PSP)共振激发的宽带可见光吸收体。这种简单的结构是由连续的金/硅多层膜构成的，上面覆盖着一维金栅。带宽的展宽是由PSP的层间杂化和光谱叠加引起的，这是用解析耦合振子模型预测的，并用RCWA模拟进行了验证。平均吸收随着金/二氧化硅对数的增加而增加，当只包括5对时，整个可见光谱的平均吸收超过95%。此外，结果还表明，随着二氧化硅层厚度的增加，吸收性能进一步增强。由于其宽带、近均匀吸收和制造简单的优点，这种设计可能在光伏电池和热发射器领域有很好的应用前景。(C)2016年度美国光学学会
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