Dispersion management of anisotropic metamirror for super-octave bandwidth polarization conversion.

Dispersion management of anisotropic metamirror for super-octave bandwidth polarization conversion.
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DOI:
10.1038/srep08434
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发表时间:
2015-02-13
期刊:
影响因子:
4.6
通讯作者:
Luo X
Luo X
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Guo Y;Wang Y;Pu M;Zhao Z;Wu X;Ma X;Wang C;Yan L;Luo X

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超材料的色散工程是至关重要的,但在宽带和多光谱响应的应用中还没有完全释放。在这里,我们提出了一种策略,以规避带宽限制的超材料,通过实施二维色散工程的元原子。利用洛伦兹共振作为专门设计的元原子的两个维度中的构建块来构建预期的色散。我们通过设计和制作一个各向异性超反镜来验证这种策略,该超反镜可以在4倍频程带宽内完成消色差偏振转换(是以前宽带转换器的两倍)。这项工作不仅为宽带超材料的设计铺平了道路,而且还激发了色散管理在纳米光子学中的潜在应用。
Dispersion engineering of metamaterials is critical yet not fully released in applications where broadband and multispectral responses are desirable. Here we propose a strategy to circumvent the bandwidth limitation of metamaterials by implementing two-dimensional dispersion engineering in the meta-atoms. Lorentzian resonances are exploited as building blocks in both dimensions of the dedicatedly designed meta-atoms to construct the expected dispersion. We validated this strategy by designing and fabricating an anisotropic metamirror, which can accomplish achromatic polarization transformation in 4-octave bandwidth (two times of previous broadband converters). This work not only paves the way for broadband metamaterials design but also inspire potential applications of dispersion management in nano-photonics.
具有对称相干照明的超薄宽带近乎完美的吸收体
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影响因子: 3.8
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