Optofluidic trapping and transport on solid core waveguides within a microfluidic device
Optofluidic trapping and transport on solid core waveguides within a microfluidic device
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DOI：
10.1364/oe.15.014322
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发表时间：
2007-10-29
期刊：
影响因子：
3.8
通讯作者：
Lipson, Michal
中科院分区：
文献类型：
--
作者：
Schmidt, Bradley S.;Yang, Allen H. J.;Lipson, Michal
在这项工作中，我们展示了一个集成的微流体/光子结构，用于在固体核心波导的倏逝场中执行动态光流体捕获和粒子输运。我们的架构由SU-8聚合物波导结合软光刻定义的聚二甲基硅氧烷（PDMS）微流控通道组成。由倏逝场施加的力导致粒子被吸引到波导表面，并在垂直于光传播方向和与压力驱动流方向相反的方向上推进。对于直径为3 μ m的聚苯乙烯球，捕获位置的引导光功率估计为53.5 mW，速度高达28 μ m/s。在这种装置中，光学力的粒度依赖性也被表征。(C) 2007年美国光学学会。
In this work we demonstrate an integrated microfluidic/photonic architecture for performing dynamic optofluidic trapping and transport of particles in the evanescent field of solid core waveguides. Our architecture consists of SU-8 polymer waveguides combined with soft lithography defined poly(dimethylsiloxane) (PDMS) microfluidic channels. The forces exerted by the evanescent field result in both the attraction of particles to the waveguide surface and propulsion in the direction of optical propagation both perpendicular and opposite to the direction of pressure-driven flow. Velocities as high as 28 mu m/s were achieved for 3 mu m diameter polystyrene spheres with an estimated 53.5 mW of guided optical power at the trapping location. The particle-size dependence of the optical forces in such devices is also characterized. (C) 2007 Optical Society of America.