Abstract：
: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.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Guo Y,Wang Y,Pu M,Zhao Z,Wu X,Ma X,Wang C,Yan L,Luo Xdoi
10.1038/srep08434subject
Has Abstractpub_date
2015-02-13 00:00:00pages
8434issn
2045-2322pii
srep08434journal_volume
5pub_type
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