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APS » Journals » Phys. Rev. Lett. » Volume 99 » Issue 13
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Phys. Rev. Lett. 99, 137205 (2007) [4 pages]

Passive Cooling of a Micromechanical Oscillator with a Resonant Electric Circuit

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K. R. Brown*, J. Britton, R. J. Epstein, J. Chiaverini†, D. Leibfried, and D. J. Wineland
Time and Frequency Division, National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA

Received 8 May 2007; published 26 September 2007

We cool the fundamental mode of a miniature cantilever by capacitively coupling it to a driven rf resonant circuit. Cooling results from the rf capacitive force, which is phase shifted relative to the cantilever motion. We demonstrate the technique by cooling a 7 kHz cantilever from room temperature to 45 K, obtaining reasonable agreement with a model for the cooling, damping, and frequency shift. Extending the method to higher frequencies in a cryogenic system could enable ground state cooling and may prove simpler than related optical experiments in a low temperature apparatus.

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.99.137205
DOI:
10.1103/PhysRevLett.99.137205
PACS:
85.85.+j, 05.40.Jc

*krbrown@boulder.nist.gov

†Present address: Los Alamos National Laboratory, MS D454, P-21, Los Alamos, NM 87545, USA.

 
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