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arXiv 1107.2818cond-mat.mes-hall
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机械边带激励控制微悬臂梁的Q值

Q-factor control of a microcantilever by mechanical sideband excitation

W. J. Venstra, H. J. R. Westra, H. S. J. van der Zant

摘要:

我们展示了一个微悬臂梁的基本和第二弯曲模式之间的耦合。然后采用腔光学力学的机械模拟,其中机械腔由相同悬臂的第二振动模式形成,通过几何非线性耦合到基模。通过以基本弯曲模式和第二弯曲模式之间的和频和差频激励悬臂,悬臂的基本模式的运动被放大和阻尼。该概念使得可以在宽范围内增强或抑制Q因子。

英文摘要:

We demonstrate the coupling between the fundamental and second flexural mode of a microcantilever. A mechanical analogue of cavity-optomechanics is then employed, where the mechanical cavity is formed by the second vibrational mode of the same cantilever, coupled to the fundamental mode via the geometric nonlinearity. By exciting the cantilever at the sum and difference frequencies between fundamental and second flexural mode, the motion of the fundamental mode of the cantilever is amplified and damped. This concept makes it possible to enhance or suppress the Q-factor over a wide range.

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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