Terahertz response of carbon nanotube transistors

We present an approach for time-dependent quantum transport based on a self-consistent nonequilibrium 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...

Full description

Saved in:
Bibliographic Details
Published inPhysical review letters Vol. 103; no. 2; p. 026601
Main Authors Kienle, Diego, Léonard, François
Format Journal Article
LanguageEnglish
Published United States 10.07.2009
Online AccessGet more information

Cover

More Information
Summary:We present an approach for time-dependent quantum transport based on a self-consistent nonequilibrium 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.
ISSN:0031-9007
DOI:10.1103/PhysRevLett.103.026601