Parametrically pumped ultrahigh Q electromechanical resonator
Parametrically pumped ultrahigh Q electromechanical resonator
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DOI：
10.1063/1.2949319
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发表时间：
2008-06-23
影响因子：
4
通讯作者：
Yamaguchi, H.
中科院分区：
文献类型：
--
作者：
Mahboob, I.;Yamaguchi, H.
机电谐振的频谱纯度（品质因数Q）可以通过压电效应介导的弹簧常数的双频率调制来参数化地激励基模而提高一个以上的数量级至类似于2.5 × 10（6）。我们从理论上证明，这种Q增强是一个内在的属性的参量谐振器通过解决这个系统的运动方程。这里展示的Q增强导致谐振中的较小扰动（类似于0.05Hz）变得可见，这使得机电振荡器的电荷灵敏度能够提高等于Q增强的因子。(C)2008年美国物理学会。
The spectral purity of an electromechanical resonance (quality factor Q) can be enhanced by more than one order of magnitude to similar to 2.5 x 10(6) by parametrically exciting the fundamental mode via double frequency modulations to the spring constant mediated by the piezoelectric effect. We theoretically demonstrate that this Q enhancement is an intrinsic property of the parametric resonator by solving the equation of motion for this system. The Q enhancement demonstrated here results in smaller perturbations in the resonance (similar to 0.05 Hz) becoming visible which enables the charge sensitivity of the electromechanical oscillator to improve by a factor equal to the Q enhancement. (C) 2008 American Institute of Physics.