Terahertz response of carbon nanotube transistors

Details Terahertz response of carbon nanotube transistors Terahertz response of carbon nanotube transistors

2009-06-16

arxiv.org/abs/0906.2826v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

10 pages, 4 figures, accepted in Physical Review Letters

Scientific paper

We present an approach for time-dependent quantum transport based on a self-consistent non-equilibrium Green function formalism. The technique is applied to a ballistic carbon nanotube transistor in the presence of a time harmonic signal at the gate. In the ON state the dynamic conductance exhibits plasmonic resonant peaks at terahertz frequencies. These vanish in the OFF state, and the dynamic conductance displays smooth oscillations, a signature of single particle quantum effects. We show that the nanotube kinetic inductance plays an essential role in the high-frequency behavior.

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