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. 2020 Sep 14;378(2182):20190609. doi: 10.1098/rsta.2019.0609

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© 2020 The Author(s)

Published by the Royal Society. All rights reserved.

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Figure 2. — (a) Switchable THz spatial light-active metasurface based on the Schottky structure, and its schematic. The figure on the right shows the modulation rate obtained by measuring the RC time constant according to the external series resistance [73]. (b) Metasurface grating based on the Schottky structure and experimental structure for THz transmission measurement. The figure on the right shows the intensity curve under different biases when the diffraction angle is 36.1° [74]. (c) Complementary THz metasurface structure based on the diode effect, and transmission spectrum of the deflected wave [75]. (Online version in colour.)