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Optical coupling to nanoscale optomechanical cavities for near quantum-limited motion transduction

Cohen, Justin D. and Meenehan, Seán M. and Painter, Oskar (2013) Optical coupling to nanoscale optomechanical cavities for near quantum-limited motion transduction. Optics Express, 21 (9). pp. 11227-11236. ISSN 1094-4087. doi:10.1364/OE.21.011227.

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A significant challenge in the development of chip-scale cavity-optomechanical devices as testbeds for quantum experiments and classical metrology lies in the coupling of light from nanoscale optical mode volumes to conventional optical components such as lenses and fibers. In this work we demonstrate a high-efficiency, single-sided fiber-optic coupling platform for optomechanical cavities. By utilizing an adiabatic waveguide taper to transform a single optical mode between a photonic crystal zipper cavity and a permanently mounted fiber, we achieve a collection efficiency for intracavity photons of 52% at the cavity resonance wavelength of λ ≈ 1538 nm. An optical balanced homodyne measurement of the displacement fluctuations of the fundamental in-plane mechanical resonance at 3.3 MHz reveals that the imprecision noise floor lies a factor of 2.8 above the standard quantum limit (SQL) for continuous position measurement, with a predicted total added noise of 1.4 phonons at the optimal probe power. The combination of extremely low measurement noise and robust fiber alignment presents significant progress towards single-phonon sensitivity for these sorts of integrated micro-optomechanical cavities.

Item Type:Article
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URLURL TypeDescription DOIArticle Paper
Painter, Oskar0000-0002-1581-9209
Additional Information:© 2013 Optical Society of America. Received 8 Feb 2013; revised 22 Apr 2013; accepted 22 Apr 2013; published 1 May 2013. This work was supported by the DARPA/MTO ORCHID and MESO programs, the Institute for Quantum Information and Matter, an NSF Physics Frontiers Center with support of the Gordon and Betty Moore Foundation, and by the AFOSR QuMPASS MURI. We gratefully acknowledge critical support and infrastructure provided for this work by the Kavli Nanoscience Institute at Caltech.
Group:Institute for Quantum Information and Matter, Kavli Nanoscience Institute
Funding AgencyGrant Number
Defense Advanced Research Projects Agency (DARPA)UNSPECIFIED
Institute for Quantum Information and Matter (IQIM)UNSPECIFIED
NSF Physics Frontiers CenterUNSPECIFIED
Gordon & Betty Moore FoundationUNSPECIFIED
Air Force Office of Scientific Research (AFOSR)UNSPECIFIED
Issue or Number:9
Classification Code:OCIS codes: (230.5298) Photonic crystals; (230.3120) Integrated optics devices; (120.4880) Optomechanics; (280.4788) Optical sensing and sensors; (350.4238) Nanophotonics and photonic crystals
Record Number:CaltechAUTHORS:20130627-090117104
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:39117
Deposited By: Tony Diaz
Deposited On:28 Jun 2013 15:12
Last Modified:09 Nov 2021 23:42

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