A femtosecond laser at 800 nm was used to create micro-fluidic circuits on lithium niobate (LiNbO3) substrates by means of laser ablation, using different scanning velocities (100-500 μm/s) and laser pulse energies (1-20 μJ). The T-junction geometry was exploited to create on y-cut LiNbO3 crystals a droplet generator, whose microfluidic performance was characterized in a wide range of droplet generation frequencies, from few Hz to about 1 kHz.
Physics and Astronomy Department, University of Padua, Via Marzolo 8, 35131 Padua, Italy and Nonlinear Photonics Group, Institute of Applied Physics, University of Münster Corrensstrasse 2/4, 48149 Münster, Germany
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