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Thermalization properties at mK temperatures of a nanoscale optomechanical resonator with acoustic-bandgap shield

Meenehan, Seán M. and Cohen, Justin D. and Gröblacher, Simon and Hill, Jeff T. and Safavi-Naeini, Amir H. and Aspelmeyer, Markus and Painter, Oskar (2014) Thermalization properties at mK temperatures of a nanoscale optomechanical resonator with acoustic-bandgap shield. . (Submitted)

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Optical measurements of a nanoscale silicon optomechanical crystal cavity with a mechanical resonance frequency of 3.6 GHz are performed at sub-kelvin temperatures. We infer optical-absorption-induced heating and damping of the mechanical resonator from measurements of phonon occupancy and motional sideband asymmetry. At the lowest probe power and lowest fridge temperature(T_f = 10 mK), the localized mechanical resonance is found to couple at a rate of γ_i/2π = 400 Hz (Q_m = 9 x 10^6) to a thermal bath of temperature T_b ≈ 270 mK. These measurements indicate that silicon optomechanical crystals cooled to millikelvin temperatures should be suitable for a variety of experiments involving coherent coupling between photons and phonons at the single quanta level.

Item Type:Report or Paper (Discussion Paper)
Related URLs:
URLURL TypeDescription Paper
Safavi-Naeini, Amir H.0000-0001-6176-1274
Painter, Oskar0000-0002-1581-9209
Additional Information:The authors would like to thank Michael Roukes, Ron Lifshitz, and Michael Cross for helpful discussions regarding the proposed thermal model, as well as Jasper Chan, Witlef Wiezcorek, and Jason Hoelscher-Obermaier for support in the early stages of the experiment. 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, and the Kavli Nanoscience Institute at Caltech. ASN acknowledges support from NSERC. SG was supported by a Marie Curie International Outgoing Fellowship within the 7th European Community Framework Programme.
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
Gordon and Betty Moore FoundationUNSPECIFIED
Kavli Nanoscience InstituteUNSPECIFIED
Natural Sciences and Engineering Research Council of Canada (NSERC)UNSPECIFIED
Marie Curie FellowshipUNSPECIFIED
Record Number:CaltechAUTHORS:20140402-105840104
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:44606
Deposited On:03 Apr 2014 18:39
Last Modified:02 Jun 2023 00:20

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