Abstract
An optical manipulation of particles can provide us noninvasive and contamination-free handling for tiny objects in a microfluidic device. In this study, we developed optofluidic beam switching functionality which works in microfluidic device. Then, we integrated this beam switching functionality into on-chip particle transportation device by optical radiation pressure to perform particle manipulation at different position. It leads miniaturization of devices and enable to complex manipulation. The developed light-switch has two triangular chambers connected to microchannel which can be fabricated by the standard photolithography. Filling liquid into it and irradiating light, the path of the light can be changed in parallel by refraction relying on the refractive indices of the liquid and wall. The device has a planar waveguide for beam propagation. Consequently, we demonstrated the beam switching of 1064 nm laser and particle transportation of 5 μm particle.
