Frequency and Q factor control of nanomechanical resonators
Frequency and Q factor control of nanomechanical resonators
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DOI：
10.1063/1.4751351
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发表时间：
2012-09-03
影响因子：
4
通讯作者：
Weig, Eva M.
中科院分区：
文献类型：
--
作者：
Rieger, Johannes;Faust, Thomas;Weig, Eva M.
我们提出了一个集成的方案，介电驱动和读出的高Q值纳米机械谐振器，使调谐的谐振频率和品质因数与施加的直流电压。一个简单的模型来改变这些量，将谐振器的复杂的电极化和位置在一个不均匀的电场，这与实验结果和有限元模拟非常吻合。比较两个样品的几何形状表明，仔细的电极设计确定的弦谐振器的弯曲模式的频率调谐的方向。此外，我们表明，机械品质因数可以电压降低六倍。(C)2012年美国物理学会。[http：//dx.doi.org/10.1063/1.4751351]
We present an integrated scheme for dielectric drive and read-out of high-Q nanomechanical resonators that enable tuning of both the resonance frequency and quality factor with an applied dc voltage. A simple model for altering these quantities is derived, incorporating the resonator's complex electric polarizability and position in an inhomogeneous electric field, which agrees very well with experimental findings and finite element simulations. Comparing two sample geometries demonstrates that careful electrode design determines the direction of frequency tuning of flexural modes of a string resonator. Furthermore, we show that the mechanical quality factor can be voltage reduced sixfold. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4751351]