Dynamics of microbubble generation and trapping by self-focused femtosecond laser pulses.
Dynamics of microbubble generation and trapping by self-focused femtosecond laser pulses.
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DOI：
10.1063/1.3187535
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发表时间：
2009-08
影响因子：
4
通讯作者：
Kun Yang;Yun Zhou;Q. Ren;J. Ye;C. Deng
中科院分区：
文献类型：
--
作者：
Kun Yang;Yun Zhou;Q. Ren;J. Ye;C. Deng
与用于捕获高折射率微米级颗粒的传统光镊不同，飞秒激光的气泡产生和捕获提供了操纵微气泡的独特策略。使用高频超声成像和快帧光学视频显微镜，我们获得的结果揭示了自聚焦飞秒激光脉冲在激光束沿线多个位置产生和捕获气泡的时空特征。我们检测到与激光焦点相关的不同声信号，并通过使用声辐射力从激光束中去除气泡来测量捕获力。
Different from conventional optical tweezers used for trapping high refractive index micron-sized particles, bubble generation and trapping by femtosecond laser offer a unique strategy to manipulate microbubbles. Using high frequency ultrasound imaging and fast-frame optical video microscopy, we obtained results revealing the spatiotemporal characteristics of bubble generation and trapping by self-focused femtosecond laser pulses at multiple locations along the laser beam. We detected distinct acoustic signals associated with the laser focus and measured the trapping force by using acoustic radiation force to detrap the bubble from the laser beam.