Abstract：
:We propose a method for dual-channel near-field manipulations by designing isotropic but inhomogeneous metasurfaces. As example, we present a dual-channel near-field focusing metasurface device. When the device is driven by surface waves from different channels on the metasurface, the near fields will be focused at the same spatial point with different polarizations. Conversely, if a linearly polarized source is radiated at the spatial focal point, different channels will be evoked on the metasurface controlled by polarization. We fabricated and measured the metasurface device in the microwave frequency. Well agreements between the simulation and measurement results are observed. The proposed method exhibits great flexibility in controlling the surface waves and spatial waves simultaneously. It is expected that the proposed method and dual-channel device will facilitate the manipulation of near electromagnetic or optical waves in different frequency regimes.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Wan X,Cai BG,Li YB,Cui TJdoi
10.1038/srep15853subject
Has Abstractpub_date
2015-11-03 00:00:00pages
15853issn
2045-2322pii
srep15853journal_volume
5pub_type
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