Journal
PHYSICAL REVIEW A
Volume 93, Issue 1, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.93.013836
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Funding
- University of Alberta, Faculty of Science
- Alberta Innovates Technology Futures (Tier 3 Strategic Chair iCiNano)
- Natural Sciences and Engineering Research Council, Canada [RGPIN 401918, EQPEG 458523]
- Canada Foundation for Innovation
- Alfred P. Sloan Foundation
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We present measurements of silica optomechanical resonators, known as bottle resonators, passively cooled in a cryogenic environment. These devices possess a suite of properties that make them advantageous for preparation and measurement in the mechanical ground state, including high mechanical frequency, high optical and mechanical quality factors, and optomechanical sideband resolution. Performing thermometry of the mechanical motion, we find that the optical and mechanical modes demonstrate quantitatively similar laser-induced heating, limiting the lowest average phonon occupation observed to just similar to 1500. Thermalization to the 9 mK thermal bath would facilitate quantum measurements on these promising nanogram-scale mechanical resonators.
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