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arXiv 0905.2716physics.optics
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由光学梯度力驱动的机械振荡和冷却

Mechanical oscillation and cooling actuated by the optical gradient force

Qiang Lin, Jessie Rosenberg, Xiaoshun Jiang, Kerry J. Vahala, Oskar Painter

摘要:

在这项工作中,我们结合了大的每光子光学梯度力与高品质因数回音壁微腔的灵敏反馈。腔体的几何形状,由一对二氧化硅磁盘分开的纳米级的差距,显示出非常强大的动力学反作用,强大到足以激发巨大的相干振荡,即使在严重阻尼条件下(机械Q=4)。在真空中,再生机械振荡的阈值被降低到仅270毫微瓦的光输入功率,或大约1000个存储的腔光子,并且对于4微瓦的下降的光输入功率,利用13 dB的温度压缩因子获得机械运动的有效冷却。

英文摘要:

In this work we combine the large per-photon optical gradient force with the sensitive feedback of a high quality factor whispering-gallery microcavity. The cavity geometry, consisting of a pair of silica disks separated by a nanoscale gap, shows extremely strong dynamical backaction, powerful enough to excite giant coherent oscillations even under heavily damped conditions (mechanical Q=4). In vacuum, the threshold for regenerative mechanical oscillation is lowered to an optical input power of only 270-nanoWatts, or roughly 1000 stored cavity photons, and efficient cooling of the mechanical motion is obtained with a temperature compression factor of 13-dB for 4-microWatts of dropped optical input power.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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