Due to their excellent performance in manipulating electromagnetic (EM) waves freely and flexibly, metasurfaces have been widely investigated since the beginning of the 21st century. However, with the rapid development of digital information technology, the traditional analog metasurfaces with continuous phase control become difficult to control digital information. In 2014, digital coding and programmable metasurfaces were proposed, which make it possible to manipulate the EM waves from the digital aspect, building up a bridge between information science and physical metasurface. Recently, some researchers have proposed a novel broadband transmission-type 1-bit digital coding metasurface and analyzed its manipulations on EM far-field radiating functionalities.
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Source: Phys.org