【摘 要】
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Metasurfaces,a 2D counterpart of metamaterials,are made of planar subwavelength-scale meta-atoms with designed distributions.The meta-atoms of a metasurface can
【机 构】
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Department of Electronic and Information Engineering,The Hong Kong Polytechnic University,China
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Metasurfaces,a 2D counterpart of metamaterials,are made of planar subwavelength-scale meta-atoms with designed distributions.The meta-atoms of a metasurface can be used to cou-ple incident waves to free space with controllable amplitudes,phases and polarizations,yielding many novel pho-tonic devices such as optical meta-lenses[1-4].In recent years,with the bloom of information technologies,efforts have been made to braid metasurfaces with digital and information science,rendering the emergence of a digital-coding metasurface,field-programmable metasurface,information metasurface and intelligent metasurface[5-7].
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