Phys. Rev. B 76, 180201(R) (2007) [4 pages]Underlying mechanisms of the self-sustained oscillation of a nanomechanical stochastic resonator in a liquid
We study the stochastic response of a nanomechanical resonator in a liquid connected to a feedback loop to increase the quality (Q) factor. We distinguish two regimes in the oscillation. Below a critical value of the feedback gain, an effective increase of the Q factor and temperature is produced. When the gain surpasses the critical value, the resonator initially behaves as having negative damping until the saturation of the system comes into play and a steady situation is reached. In this regime, frequency stabilities of about 1 part per 106 can be achieved. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.76.180201
DOI:
10.1103/PhysRevB.76.180201
PACS:
62.10.+s, 46.40.−f, 05.40.−a, 46.70.De
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