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Space‐time modulated metasurfaces enable efficient manipulations of nonlinear harmonics with more degrees of freedom than conventional materials by simply controlling the element geometries and modulation signals. The theoretical analyses reveal that a group of harmonics in reflected waves could be generated by the metasurface under the incidence of monochromatic wave with the rapid change of surface...
A new design of a space‐time‐coding digital metasurface for high‐efficiency spatial synthesis is proposed by Qiang Cheng, Shi Jin, Tie Jun Cui, and co‐workers, in article number 1900133. By employing linear phase modulation to the metasurface, both frequency conversion and beam shaping are implemented simultaneously with the maximum conversion efficiency of 88.81% and largest harmonic suppression...
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