Large cooperativity and microkelvin cooling with a three-dimensional optomechanical cavity.
Large cooperativity and microkelvin cooling with a three-dimensional optomechanical cavity.
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DOI：
10.1038/ncomms9491
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发表时间：
2015-10-09
影响因子：
16.6
通讯作者：
Steele GA
中科院分区：
文献类型：
--
作者：
Yuan M;Singh V;Blanter YM;Steele GA
在腔光学力学中，光被用来控制机械运动。该领域的一个中心目标是实现单光子强耦合，这将使量子运动叠加态的创建成为可能。达到这个极限需要在光机械耦合和腔相干性方面的显著改进。在这里，我们介绍了一个光学机械结构的氮化硅膜耦合到一个三维超导微波腔。利用它们的大品质因数，我们实现了146，000的光机协同系数，并将千赫兹频率膜运动的边带冷却到34±5 μK，这是迄今为止报道的最低机械模式温度。所实现的冷却仅受信号发生器的经典噪声的限制，并且应该通过超导滤波器深入到基态。我们的研究结果表明，这种光力学的实现有可能达到超大合作和单光子强耦合的制度，开辟了新一代的实验。 光力学是利用光来控制机械谐振器的运动，可能将其冷却到量子基态。在这里，作者通过将毫米级氮化硅膜耦合到三维微波腔体将其冷却到34微开尔文的有效温度。
In cavity optomechanics, light is used to control mechanical motion. A central goal of the field is achieving single-photon strong coupling, which would enable the creation of quantum superposition states of motion. Reaching this limit requires significant improvements in optomechanical coupling and cavity coherence. Here we introduce an optomechanical architecture consisting of a silicon nitride membrane coupled to a three-dimensional superconducting microwave cavity. Exploiting their large quality factors, we achieve an optomechanical cooperativity of 146,000 and perform sideband cooling of the kilohertz-frequency membrane motion to 34±5 μK, the lowest mechanical mode temperature reported to date. The achieved cooling is limited only by classical noise of the signal generator, and should extend deep into the ground state with superconducting filters. Our results suggest that this realization of optomechanics has the potential to reach the regimes of ultra-large cooperativity and single-photon strong coupling, opening up a new generation of experiments. Optomechanics is the use of light to control the motion of a mechanical resonator, potentially cooling it to the quantum ground state. Here, the authors cool a millimetre-scale silicon nitride membrane to an effective temperature of 34 microkelvin by coupling it to a three-dimensional microwave cavity.