Electrically tunable terahertz metamaterials with embedded large-area transparent thin-film transistor arrays
Date
2016
Authors
Xu, Wei-Zong
Ren, Fang-Fang
Ye, Jiandong
Lu, Hai
Liang, Lanju
Huang, Xiaoming
Liu, Mingkai
Shadrivov, Ilya
Powell, David
Yu, Guang
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Nature Publishing Group
Abstract
Engineering metamaterials with tunable resonances are of great importance for improving the functionality and flexibility of terahertz (THz) systems. An ongoing challenge in THz science and technology is to create large-area active metamaterials as building blocks to enable efficient and precise control of THz signals. Here, an active metamaterial device based on enhancement-mode transparent amorphous oxide thin-film transistor arrays for THz modulation is demonstrated. Analytical modelling based on full-wave techniques and multipole theory exhibits excellent consistent with the experimental observations and reveals that the intrinsic resonance mode at 0.75 THz is dominated by an electric response. The resonant behavior can be effectively tuned by controlling the channel conductivity through an external bias. Such metal/oxide thin-film transistor based controllable metamaterials are energy saving, low cost, large area and ready for mass-production, which are expected to be widely used in future THz imaging, sensing, communications and other applications.
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Scientific Reports
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Journal article
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Open Access
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