Carbon nanotubes as ultra-high quality factor mechanical resonators

Details Carbon nanotubes as ultra-high quality factor mechanical resonators Carbon nanotubes as ultra-high quality factor mechanical resonators

2009-07-16

arxiv.org/abs/0907.2823v2

Nano Lett, 2009, 9 (7), pp 2547-2552

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

18 pages including supplementary information, fixed minor LaTeX figure reference labelling problem

Scientific paper

10.1021/nl900612h

We have observed the transversal vibration mode of suspended carbon nanotubes at millikelvin temperatures by measuring the single-electron tunneling current. The suspended nanotubes are actuated contact-free by the radio frequency electric field of a nearby antenna; the mechanical resonance is detected in the time-averaged current through the nanotube. Sharp, gate-tuneable resonances due to the bending mode of the nanotube are observed, combining resonance frequencies of up to \nu_0 = 350 MHz with quality factors above Q = 10^5, much higher than previously reported results on suspended carbon nanotube resonators. The measured magnitude and temperature dependence of the Q-factor shows a remarkable agreement with the intrinsic damping predicted for a suspended carbon nanotube. By adjusting the RF power on the antenna, we find that the nanotube resonator can easily be driven into the non-linear regime.

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