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Ultrafast Terahertz Metadevices
In article number 2104275, Jiangang Liang, Chunhai Fan, Chao Chang, and co‐workers present a germanium hybrid metallic metasurface under dual‐stimulus control. Photoexcitation of germanium film enables 100% modulation depth of Fano resonance and ultrafast switching time within 10 ps. By adding current‐bias, the pump threshold to modulate the metasurface is greatly reduced...
Arming metasurface with active materials furnishes a feasible solution to dynamically control over terahertz (THz) waves, which is extremely significant for the realization of upcoming sixth generation telecommunications. However, the present active materials are mainly limited to single external driving field, hindering the capability of metasurface for flexible manipulation of THz waves. Besides,...
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