Cooling and Control of a Cavity Optoelectromechanical System

Department of Physics, University of Queensland, St Lucia, Queensland 4072, Australia.
Physical Review Letters (Impact Factor: 7.51). 03/2010; 104(12):123604. DOI: 10.1103/PhysRevLett.104.123604
Source: PubMed


We implement a cavity optoelectromechanical system integrating electrical actuation capabilities of nanoelectromechanical devices with ultrasensitive mechanical transduction achieved via intracavity optomechanical coupling. Electrical gradient forces as large as 0.40 microN are realized, with simultaneous mechanical transduction sensitivity of 1.5x10{-18} m Hz{-1/2} representing a 3 orders of magnitude improvement over any nanoelectromechanical system to date. Optoelectromechanical feedback cooling is demonstrated, exhibiting strong squashing of the in-loop transduction signal. Out-of-loop transduction provides accurate temperature calibration even in the critical paradigm where measurement backaction induces optomechanical correlations.

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