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
影响因子:
4.6
通讯作者:
Luo X
中科院分区:
文献类型:
--
作者:
Guo Y;Wang Y;Pu M;Zhao Z;Wu X;Ma X;Wang C;Yan L;Luo X
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.
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