Abstract

Terahertz (THz) waves have been widely used in medical diagnosis, high-speed communication, non-destructive detection, and other fields. Besides, graphene, a typical two-dimensional (2D) material, has excellent electron-transport properties and is one of the most promising candidates for THz light sources and detectors. Our group has developed several GFETs that enable radiation, detection, and amplification of terahertz waves [1]. The Coulomb drag effect in graphene was first discovered in separate conductive layers of graphene [2]. Recently, we theoretically revealed the occurrence of Coulomb drag in the lateral structure of mono-layer graphene. This research demonstrates a single asymmetric gated GFET (AG-GFET) that is easy to fabricate and can be used as a Coulomb drag effect-based terahertz multi-plier, detector, amplifier, as well as oscillator [3,4].

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