alexa Operation of graphene transistors at gigahertz frequencies.
Physics

Physics

Journal of Lasers, Optics & Photonics

Author(s): Lin YM, Jenkins KA, ValdesGarcia A, Small JP, Farmer DB,

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Abstract Top-gated graphene transistors operating at high frequencies (gigahertz) have been fabricated and their characteristics analyzed. The measured intrinsic current gain shows an ideal 1/f frequency dependence, indicating a FET-like behavior for graphene transistors. The cutoff frequency f(T) is found to be proportional to the dc transconductance g(m) of the device, consistent with the relation f(T) = g(m)/(2piC(G)). The peak f(T) increases with a reduced gate length, and f(T) as high as 26 GHz is measured for a graphene transistor with a gate length of 150 nm. The work represents a significant step toward the realization of graphene-based electronics for high-frequency applications. This article was published in Nano Lett and referenced in Journal of Lasers, Optics & Photonics

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