Figure | Single-gate electro-optic beam switching metasurfaces (IMAGE)
Caption
Figure | Single-gate electro-optic beam switching metasurfaces. a, (left) Schematic of an active beam switching graphene metasurface. (top right) Optical microscope top-view image of the fabricated device. (bottom right) Scanning electron microscope (SEM) top-view image of the grating for one period (false colored). b, Angle-resolved far-field pattern measured at the gate bias 10 V and -80 V at the operation frequency 41.17 THz. c, Experimentally measured absolute efficiencies and relative efficiencies for the 0th and the -1st order diffractions when the gate bias is swept from -80 V to 70 V.
Credit
Sangjun Han et al.
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License
CC BY