水和粘性液体微流控谐振腔的腔光力学
Cavity optomechanics on a microfluidic resonator with water and viscous liquids
摘要：
目前，光学或机械共振通常用于微流体研究。然而，光机械振荡的轻压力没有显示与液体。这是因为用水代替周围空气固有地增加了声阻抗，因此增加了相关的声辐射损失。在这里，我们之间的桥梁微流体和光学机械制造中空气泡谐振器内的液体和光激发100 MHz的振动，只有mW的光输入功率。这构成了第一次任何微流体系统是光机械致动的。我们进一步证明了液体上的微流体光学力学的可行性，通过演示振动的粘性耗散高于血液粘度的有机流体，同时通过振动频率偏移测量液体中的密度变化。我们的设备将使使用腔光学力学研究物质的非固相。
英文摘要：
Currently, optical- or mechanical-resonances are commonly used in microfluidic research. However, optomechanical oscillations by light pressure were not shown with liquids. This is because replacing the surrounding air with water inherently increases the acoustical impedance and hence the associated acoustical radiation-losses. Here, we bridge between microfluidics and optomechanics by fabricating hollow bubble resonators with liquid inside and optically exciting 100-MHz vibrations with only mW optical-input power. This constitutes the first time that any microfluidic system is optomechanically actuated. We further prove the feasibility of microfluidic optomechanics on liquids by demonstrating vibrations on organic fluids with viscous-dissipation higher than blood viscosity while measuring density changes in the liquid via the vibration frequency shift. Our device will enable using cavity optomechanics for studying non-solid phases of matter.
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