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Article Dans Une Revue Nano Letters Année : 2008

Single Carbon Nanotube Transistor at GHz Frequency

Résumé

We report on microwave operation of top-gated single carbon nanotube transistors. From transmission measurements in the 0.1-1.6 GHz range, we deduce device transconductance gm and gate-nanotube capacitance Cg of micro- and nanometric devices. A large and frequency-independent gm of about 20 microSiemens is observed on short devices, which meets the best dc results. The capacitance per unit gate length of 60 aF/micrometer is typical of top gates on a conventional oxide with a dielectric constant equal to 10. This value is a factor of 3-5 below the nanotube quantum capacitance which, according to recent simulations, favors high transit frequencies . For our smallest devices, we find a large transit frequency equal to 50 GHz with no evidence of saturation in ngth dependence.
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Dates et versions

hal-00272200 , version 1 (14-04-2008)

Identifiants

  • HAL Id : hal-00272200 , version 1

Citer

Julien Chaste, Lorentz Lechner, Pascal Morfin, Gwendal Fève, Takis Kontos, et al.. Single Carbon Nanotube Transistor at GHz Frequency. Nano Letters, 2008, 8 (2), pp.525. ⟨hal-00272200⟩
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