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Dynamical Backaction of Microwave Fields on a Nanomechanical Oscillator

J. D. Teufel, J. W. Harlow, C. A. Regal, and K. W. Lehnert
Phys. Rev. Lett. 101, 197203 – Published 3 November 2008

Abstract

We measure the response and thermal motion of a high-Q nanomechanical oscillator coupled to a superconducting microwave cavity in the resolved-sideband regime where the oscillator’s resonance frequency exceeds the cavity’s linewidth. The coupling between the microwave field and mechanical motion is strong enough for radiation pressure to overwhelm the intrinsic mechanical damping. This radiation-pressure damping cools the fundamental mechanical mode by a factor of 5 below the thermal equilibrium temperature in a dilution refrigerator to a phonon occupancy of 140 quanta.

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  • Received 18 July 2008

DOI:https://doi.org/10.1103/PhysRevLett.101.197203

©2008 American Physical Society

Authors & Affiliations

J. D. Teufel1,*, J. W. Harlow1,2, C. A. Regal3, and K. W. Lehnert1,2

  • 1JILA, National Institute of Standards and Technology and the University of Colorado, Boulder, Colorado 80309, USA
  • 2Department of Physics, University of Colorado, Boulder, Colorado 80309, USA
  • 3Norman Bridge Laboratory of Physics 12-33, California Institute of Technology, Pasadena, California 91125, USA

  • *john.teufel@colorado.edu

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Issue

Vol. 101, Iss. 19 — 7 November 2008

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