标题： 微流控器件的Brillouin腔光力学 显示英文标题

标题： Brillouin cavity optomechanics with microfluidic devices

摘要： 腔光学机械学允许在微谐振器中声子模式和光子模式的参数耦合，目前该领域正在广泛研究各种固态系统。 超流体光学机械被提出作为实现极低光学损耗和机械损耗的途径。然而，尚未有非固态物质的光学机械实验报道。 直接将液体浸没于光学机械实验中具有挑战性，因为声波能量会简单地泄漏到周围阻抗更高的液体中。 相反，我们在这里将液体限制在空心谐振腔内，从而实现了从 2 MHz 到 11,000 MHz 范围频率的机械回音壁模式的光学激发（例如，在 99 MHz 处机械品质因子 Q = 4700）。 即使我们将液体粘度增加到高于血液的水平，振动仍然能够持续。 我们的设备能够在液体环境中进行光学机械研究，同时光可以从毛细管的外侧干燥区域耦合，液体则通过标准的微流控入口提供。 显示英文摘要

摘要： Cavity optomechanics allows the parametric coupling of phonon- and photon-modes in microresonators and is presently investigated in a broad variety of solid-state systems. Optomechanics with superfluids has been proposed as a path towards ultra-low optical- and mechanical-dissipation. However, there have been no optomechanics experiments reported with non-solid phases of matter. Direct liquid immersion of optomechanics experiments is challenging since the acoustic energy simply leaks out to the higher-impedance liquid surrounding the device. Conversely, here we confine liquids inside hollow resonators thereby enabling optical excitation of mechanical whispering-gallery modes at frequencies ranging from 2 MHz to 11,000 MHz (for example, with mechanical Q = 4700 at 99 MHz). Vibrations are sustained even when we increase the fluid viscosity to be higher than that of blood. Our device enables optomechanical investigation with liquids, while light is conventionally coupled from the outer dry side of the capillary, and liquids are provided by means of a standard microfluidic inlet.