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arXiv 1406.0029physics.optics
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用弹性Wave Interference消除光机械谐振腔中的结构损耗

Eliminating Structural Loss in Optomechanical Resonators Using Elastic Wave Interference

Mian Zhang, Gustavo Luiz, Shreyas Shah, Gustavo Wiederhecker, Michal Lipson

摘要:

光机械谐振器遭受通过使结构能够悬挂的必要锚的机械能的耗散。在这里,我们表明,这种结构损失的光机械振荡器几乎可以完全消除通过相消干涉的弹性波使用双盘谐振器。我们还提出了预测观察到的弹性波干涉的分析和数值模型。我们的实验数据显示,无应力SiN设备的机械Q-因子高达$10^4$在机械频率为$f=102$ MHz($fQ = 10^{12}$),在室温下。

英文摘要:

Optomechanical resonators suffer from the dissipation of mechanical energy through the necessary anchors enabling the suspension of the structure. Here we show that such structural loss in an optomechnaical oscillator can be almost completely eliminated through the destructive interference of elastic waves using dual-disk resonators. We also present both analytical and numerical model that predicts the observed interference of elastic waves. Our experimental data reveal unstressed SiN devices with mechanical Q-factors up to $10^4$ at mechanical frequencies of $f=102$ MHz ($fQ = 10^{12}$) at room temperature.

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