High-sensitivity monitoring of micromechanical vibration using optical whispering gallery mode resonators
High-sensitivity monitoring of micromechanical vibration using optical whispering gallery mode resonators
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DOI：
10.1088/1367-2630/10/9/095015
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发表时间：
2008-09-30
影响因子：
3.3
通讯作者：
Kippenberg, T. J.
中科院分区：
文献类型：
--
作者：
Schliesser, A.;Anetsberger, G.;Kippenberg, T. J.
在高精细度光学微谐振器中，光学和机械模式的固有耦合为微机械振动提供了一种自然的、高灵敏度的转导机制。利用零差和偏振光谱技术，我们实现了10(-19)mHz（-1/2）的弹噪声限制位移灵敏度。以前所未有的方式，这使得能够检测和研究各种机械模式，这些模式被识别为径向呼吸，弯曲和扭转模式，使用三维有限元建模。此外，测量了一个宽带等效位移噪声，发现它与硅介质腔中热折射率噪声的模型吻合得很好。讨论了基态冷却、位移传感和克尔压缩的意义。
The inherent coupling of optical and mechanical modes in high finesse optical microresonators provides a natural, highly sensitive transduction mechanism for micromechanical vibration. Using homodyne and polarization spectroscopy techniques, we achieve shot-noise limited displacement sensitivities of 10(-19) mHz(-1/2). In an unprecedented manner, this enables the detection and study of a variety of mechanical modes, which are identified as radial breathing, flexural and torsional modes using three-dimensional finite element modeling. Furthermore, a broadband equivalent displacement noise is measured and found to agree well with models for thermorefractive noise in silica dielectric cavities. Implications for ground-state cooling, displacement sensing and Kerr squeezing are discussed.