title: A high quality factor carbon nanotube mechanical resonator at 39 GHz.
abstract: We measure the mechanical resonances of an as-grown suspended carbon nanotube, detected via electrical mixing in the device. A sequence of modes extending to 39 GHz is observed with a quality factor of 35,000 in the highest mode. This unprecedentedly high combination corresponds to a thermal excited state probability below 10(-8) and a relaxation time of 140 ns with microsecond relaxation times for lower modes. The effect of electron tunneling on the mechanical resonance is found to depend on frequency as the tunneling time becomes comparable to the vibration period.
authors: Kavli Institute of Nanoscience, Delft University of Technology, P.O. Box 5046, 2600 GA Delft, The Netherlands.
authors: Edward A
authors: EA
authors: Laird
authors: Fei
authors: F
authors: Pei
authors: Wei
authors: W
authors: Tang
authors: Gary A
authors: GA
authors: Steele
authors: Leo P
authors: LP
authors: Kouwenhoven
mesh_terms: D017097:Electric Impedance; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008422:Materials Testing; D055617:Micro-Electrical-Mechanical Systems / Q000295:instrumentation*; D008872:Microwaves; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D013314:Stress, Mechanical; D014732:Vibration
chemical_list: D037742:Nanotubes, Carbon