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30 March 2020 Terahertz gain and amplification in current-driven metasurfaces of graphene Dirac plasmons
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Abstract
We explore current-driven Dirac plasmon dynamics in monolayer graphene metasurfaces. DC-current-induced complete suppression of the graphene absorption is experimentally observed in a broad frequency range followed by a giant amplification (up to ∼ 9 % gain) of an incoming terahertz radiation at room temperature.
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S. A. Boubanga-Tombet, D. Yadav, A. Satou, W. Knap, V. V. Popov, and T. Otsuji "Terahertz gain and amplification in current-driven metasurfaces of graphene Dirac plasmons", Proc. SPIE 11348, Terahertz Photonics, 113480P (30 March 2020); https://doi.org/10.1117/12.2559504
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