Carbon Nanotubes as Ultrahigh Quality Factor Mechanical Resonators

作者：A. K. Hüttel, Gary A. Steele, Benoit Witkamp, Menno Poot, Leo P. Kouwenhoven, Herre S. J. van der Zant · 发表于：Nano Letters · 年份：2009 · DOI：10.1021/nl900612h · 被引用次数：375 · 研究领域：Mechanical and Optical Resonators、Carbon Nanotubes in Composites、Force Microscopy Techniques and Applications

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-tunable 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 radio frequency power on the antenna, we find that the nanotube resonator can easily be driven into the nonlinear regime.