Fig. 2: Metasurface and its microwave-laser interconversion performance.
From: Wireless microwave-to-optical conversion via programmable metasurface without DC supply
a Designed meta-element with double-sided microwave resonant structures, in which the Schottky diode and photodiode are integrated, respectively. b Simulated microwave reflection amplitudes of the meta-element under different conditions. c Photographs of Resonant Structures 1 (left) and Resonant Structures 2 (right) of the metasurface sample. d Measured output green laser powers under different input microwave powers. e Measured microwave reflection amplitudes under different green laser illuminating powers. Measured switching speed of the Schottky-diode-based up-conversion metasurface (f) and the photodiode-based down-conversion metasurface (g).
