Department of Physics, Koç University, Rumelifeneri Yolu, Istanbul 34450, Turkey.
Opt Lett. 2013 Mar 1;38(5):793-5. doi: 10.1364/OL.38.000793.
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.
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。单锥形光纤用于将来自独立加热和探测激光的光耦合到单个微滴中，这些微滴被保存在高湿度腔室中的超疏水表面上。微滴的尺寸稳定性是由红外加热激光通过微滴 whispering gallery 模式的共振吸收与样品室内的水凝结之间的竞争产生的。使用可调谐红色探测激光连续监测微滴的尺寸。由于加热激光的线宽很窄，因此可以在 410 秒的时间内将半径为 110 μm 的微滴的稳定性精确稳定到 0.54nm。
