Graphene active plasmonics for terahertz device applications

Taiichi Otsuji; Alexander Dubinov; Maxim Ryzhii; Stephane Boubanga Tombet; Akira Satou; Vladimir Mitin; Michael S. Shur; Victor Ryzhii

doi:10.1117/12.2185118

22 May 2015 Graphene active plasmonics for terahertz device applications

Taiichi Otsuji, Alexander Dubinov, Maxim Ryzhii, Stephane Boubanga Tombet, Akira Satou, Vladimir Mitin, Michael S. Shur, Victor Ryzhii

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Proceedings Volume 9476, Automatic Target Recognition XXV; 94760Y (2015) https://doi.org/10.1117/12.2185118
Event: SPIE Defense + Security, 2015, Baltimore, MD, United States

Abstract

This paper reviews recent advances in the double-graphene-layer (DGL) active plasmonic heterostructures for the terahertz (THz) device applications. The DGL consists of a core shell in which a thin tunnel barrier layer is sandwiched by the two GLs being independently connected with the side contacts and outer gate stack layers at both sides. The DGL core shell works as a nano-capacitor, exhibiting inter-GL resonant tunneling (RT) when the band offset between the two GLs is aligned. The RT produces a strong nonlinearity with a negative differential conductance in the DGL current-voltage characteristics. The excitation of the graphene plasmons by the THz radiation resonantly modulates the tunneling currentvoltage characteristics. When the band offset is aligned to the THz photon energy, the DGL structure can mediate photonassisted RT, resulting in resonant emission or detection of the THz radiation. The cooperative double-resonant excitation with structure-sensitive graphene plasmons gives rise to various functionalities such as rectification (detection), photomixing, higher harmonic generation, and self-oscillation, in the THz device implementations.

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Taiichi Otsuji, Alexander Dubinov, Maxim Ryzhii, Stephane Boubanga Tombet, Akira Satou, Vladimir Mitin, Michael S. Shur, and Victor Ryzhii "Graphene active plasmonics for terahertz device applications", Proc. SPIE 9476, Automatic Target Recognition XXV, 94760Y (22 May 2015); https://doi.org/10.1117/12.2185118

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KEYWORDS

Terahertz radiation

Plasmons

Graphene

Plasma

Modulation

Electrons

Absorption

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