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Mechanical Oscillation and Cooling Actuated by the Optical Gradient Force

Lin, Qiang and Rosenberg, Jessie and Jiang, Xiaoshun and Vahala, Kerry J. and Painter, Oskar (2009) Mechanical Oscillation and Cooling Actuated by the Optical Gradient Force. Physical Review Letters, 103 (10). Art. No. 103601. ISSN 0031-9007. doi:10.1103/PhysRevLett.103.103601.

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In this work, we combine the large per-photon optical gradient force with the sensitive feedback of a high quality factor whispering-gallery microcavity. The cavity geometry, consisting of a pair of silica disks separated by a nanoscale gap, shows extremely strong dynamical backaction, powerful enough to excite coherent oscillations even under heavily damped conditions (mechanical Q≈4). In vacuum, the threshold for regenerative mechanical oscillation is lowered to an optical input power of only 270 nW, or roughly 1000 stored cavity photons, and efficient cooling of the mechanical motion is obtained with a temperature compression factor of nearly 14 dB with an input optical power of only 11 µW.

Item Type:Article
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URLURL TypeDescription PublisherArticle Paper
Vahala, Kerry J.0000-0003-1783-1380
Painter, Oskar0000-0002-1581-9209
Additional Information:© 2009 The American Physical Society. Received 24 May 2009; published 31 August 2009. The authors thank P. Herring and M. Eichenfield for early development of the double-disk structure. This work was supported by a DARPA seedling grant and the NSF (Grant No. 0622246).
Funding AgencyGrant Number
Defense Advanced Research Projects Agency (DARPA)UNSPECIFIED
Issue or Number:10
Classification Code:PACS# 42.50.Wk Mechanical effects of light on material media, microstructures and particles
Record Number:CaltechAUTHORS:20090923-143134385
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:16015
Deposited By: George Porter
Deposited On:07 Oct 2009 18:28
Last Modified:08 Nov 2021 23:24

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