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首页> 外文期刊>Comptes rendus. Physique >Cavity optomechanics and cooling nanomechanical oscillators using microresonator enhanced evanescent near-field coupling
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Cavity optomechanics and cooling nanomechanical oscillators using microresonator enhanced evanescent near-field coupling

机译：使用微谐振器增强的van逝近场耦合的腔光学机械和冷却纳米机械振荡器

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Nanomechanical oscillators are at the heart of a variety of precision measurements. This article reports on dispersive radiation coupling of nanomechanical oscillators to the evanescent near-field of toroid optical microresonators. The optomechanical coupling coefficient which reaches values >200 MHzm, corresponding to a vacuum optomechanical coupling rate >4 kHz, is characterized in detail and good agreement between experimental, analytical and finite element simulation based values is found. It is shown that both the mode-structure and -patterns of nanomechanical oscillators can be characterized relying solely on Brownian motion. Moreover, it is demonstrated that the radiation pressure interaction can cause self-sustained coherent nanomechanical oscillations at nano-Watt power levels as well as cooling of the nanomechanical oscillator. Finally, the feasibility of coupling nanomechanical motion to two optical modes where the optical mode spacing exactly equals the mechanical resonance frequency is demonstrated for the first time. As shown here, this Raman-type scheme allows both amplification and cooling.
机译：纳米机械振荡器是各种精度测量的核心。本文报道了将纳米机械振荡器的色散辐射耦合到环形光学微谐振器的van逝近场。详细表征了达到> 200 MHz / nm的值的光机耦合系数，对应于> 4 kHz的真空光机耦合速率，并发现了基于实验，分析和有限元模拟的值之间的良好一致性。结果表明，可以仅依靠布朗运动来表征纳米机械振荡器的模式结构和模式。此外，已经证明，辐射压力相互作用可以在纳瓦功率水平下引起自持相干纳米机械振荡以及纳米机械振荡器的冷却。最后，首次证明了将纳米机械运动耦合到两个光学模式的可行性，其中光学模式间隔恰好等于机械共振频率。如此处所示，这种拉曼类型的方案允许放大和冷却。

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