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Size stabilization of surface-supported liquid aerosols using tapered optical fiber coupling

机译:使用锥形光纤耦合的表面支撑液体气溶胶的尺寸稳定

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We demonstrate long-term size stabilization of surface-supported liquid aerosols of salt-water. Single tapered optical fibers were used to couple the light from independent heating and probe lasers into individual microdroplets that were kept on a superhydrophobic surface in a high-humidity chamber. Size stabilization of microdroplets resulted from competition between resonant absorption of the infrared heating laser by a microdroplet whispering gallery mode and water condensation in the sample chamber. Microdroplet size was continuously monitored using the tunable red probe laser. Thanks to the narrow linewidth of the heating laser, stabilization of the 110 μm radius of a microdroplet with a precision down to 0.54 nm was achieved for a period of 410 s.
机译:我们证明了盐水表面支撑的液体气溶胶的长期尺寸稳定性。单根锥形光纤用于将来自独立加热和探测激光器的光耦合到单个微滴中,这些微滴保持在高湿度室内的超疏水表面上。微滴的尺寸稳定是由于微滴耳语通道模式对红外加热激光器的共振吸收与样品室中的水冷凝之间的竞争所致。使用可调式红色探针激光器连续监测微滴大小。由于加热激光器的线宽较窄,可以在410 s的时间内稳定到微滴的110μm半径,精度低至0.54 nm。

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