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Pulsed excitation dynamics of an optomechanical crystal resonator near its quantum ground-state of motion

Meenehan, Seán M. and Cohen, Justin D. and MacCabe, Gregory S. and Marsili, Francesco and Shaw, Matthew D. and Painter, Oskar (2015) Pulsed excitation dynamics of an optomechanical crystal resonator near its quantum ground-state of motion. Physical Review X, 5 (4). Art. No. 041002. ISSN 2160-3308. doi:10.1103/PhysRevX.5.041002.

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Using pulsed optical excitation and read-out along with single-phonon-counting techniques, we measure the transient backaction, heating, and damping dynamics of a nanoscale silicon optomechanical crystal cavity mounted in a dilution refrigerator at a base temperature of T_f ≈ 11  mK. In addition to observing a slow (approximately 740-ns) turn-on time for the optical-absorption-induced hot-phonon bath, we measure for the 5.6-GHz “breathing” acoustic mode of the cavity an initial phonon occupancy as low as ⟨n⟩ = 0.021±0.007 (mode temperature T_(min) ≈ 70  mK) and an intrinsic mechanical decay rate of γ_0 = 328±14  Hz (Q_m ≈ 1.7×10^7). These measurements demonstrate the feasibility of using short pulsed measurements for a variety of quantum optomechanical applications despite the presence of steady-state optical heating.

Item Type:Article
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URLURL TypeDescription Paper DOIArticle
Painter, Oskar0000-0002-1581-9209
Additional Information:© 2015 American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Received 6 April 2015; published 6 October 2015. The authors would like to thank V. B. Verma, R. P. Miriam, and S.W. Nam for their help with the single-photon detectors used in this work. This work was supported by the DARPA 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, the AFOSR through the “Wiring Quantum Networks with Mechanical Transducers” MURI program, and the Kavli Nanoscience Institute at Caltech. Part of the research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration.
Group:Kavli Nanoscience Institute, Institute for Quantum Information and Matter
Funding AgencyGrant Number
Defense Advanced Research Projects Agency (DARPA)UNSPECIFIED
Institute for Quantum Information and Matter (IQIM)UNSPECIFIED
NSF Physics Frontiers CenterUNSPECIFIED
Gordon and Betty Moore FoundationUNSPECIFIED
Air Force Office of Scientific Research (AFOSR)UNSPECIFIED
Kavli Nanoscience Institute (KNI)UNSPECIFIED
Issue or Number:4
Classification Code:PACS numbers: 42.50.Wk, 42.65.—k, 62.25.—g
Record Number:CaltechAUTHORS:20150317-184439024
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:55868
Deposited By: Joy Painter
Deposited On:18 Mar 2015 04:15
Last Modified:10 Nov 2021 20:51

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