Spring constant and damping constant tuning of nanomechanical resonators using a single-electron transistor
By fabricating a single-electron transistor onto a mechanical system in a high magnetic field, it is shown that one can manipulate both the mechanical spring constant and damping constant by adjusting a potential of a nearby gate electrode. The spring constant effect is shown to be usable to control the resonant frequency of silicon-based nanomechanical resonators, while an additional damping constant effect is relevant for the resonators built upon carbon nanotube or similar molecular-sized materials. This could prove to be a very convenient scheme to actively control the response of nanomechanical systems for a variety of applications including radio-frequency signal processing, ultrasensitive force detection, and fundamental physics explorations.
Additional Information© 2002 American Institute of Physics. Received 28 September 2001; accepted for publication 11 December 2001. This work is supported by the National Security Agency and ARDA. I would like to acknowledge very helpful conversations with M. L. Roukes, Matt LaHaye, Miles Blencowe, Andrew Armour, and the participants at the QUEST workshop hosted by Los Alamos National Laboratory.
Published - 1.1449533.pdf