Abstract：
:Recently, a concept of digital metamaterials has been proposed to manipulate field distribution through proper spatial mixtures of digital metamaterial bits. Here, we present a design of 2-bit digitally-controlled coding metasurface that can effectively modulate the scattered electromagnetic wave and realize different far-field beams. Each meta-atom of this metasurface integrates two pin diodes, and by tuning their operating states, the metasurface has four phase responses of 0, π/2, π, and 3π/2, corresponding to four basic digital elements "00", "01", "10", and "11", respectively. By designing the coding sequence of the above digital element array, the reflected beam can be arbitrarily controlled. The proposed 2-bit digital metasurface has been demonstrated to possess capability of achieving beam deflection, multi-beam and beam diffusion, and the dynamical switching of these different scattering patterns is completed by a programmable electric source.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Huang C,Sun B,Pan W,Cui J,Wu X,Luo Xdoi
10.1038/srep42302subject
Has Abstractpub_date
2017-02-08 00:00:00pages
42302issn
2045-2322pii
srep42302journal_volume
7pub_type
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