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Self-oscillation of micromechanical resonators

In this paper, we describe the self-oscillation of a mirror due to light-induced force gradients. A Fabry-Perot microcavity in which one of the mirrors is a soft compliant gold coated microlever is used to demonstrate amplitude amplification by monochromatic laser light. Depending on the phase difference in the cavity the vibrational amplitude of the mirror could be heated using CW laser light. The mechanical quality factor of the resonator could be tuned from its natural value of about 365 up to more than 3600.