Optomechanics and thermometry of cryogenic silica microresonators
Optomechanics and thermometry of cryogenic silica microresonators
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DOI：
10.1103/physreva.93.013836
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发表时间：
2016-01-19
影响因子：
2.9
通讯作者：
Davis, J. P.
中科院分区：
文献类型：
--
作者：
MacDonald, A. J. R.;Hauer, B. D.;Davis, J. P.
我们提出了二氧化硅光机械谐振器的测量，被称为瓶谐振器，在低温环境中被动冷却。这些器件具有一系列特性，使其有利于在机械基态下的制备和测量，包括高机械频率，高光学和机械质量因子，以及光机械边带分辨率。对机械运动进行测温，我们发现光学和机械模式在定量上表现出相似的激光诱导加热，将观察到的最低平均声子占用限制在接近1500。9 mK热浴的热化将有助于对这些有前途的纳克级机械谐振器进行量子测量。
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.