https://doi.org/10.1051/epjconf/202430500006
Manipulation of Microparticles in Optofluidic Devices Fabricated by Femtosecond Laser Micromachining
1 Department of Physics and Astronomy, Faculty of Sciences of University of Porto, 4169-007 Porto, Portugal
2 CAP – Centre for Applied Photonics, INESC TEC, 4150-179 Porto, Portugal
* Corresponding author: carolina.cameira@inesctec.pt
Published online: 15 October 2024
This study reports the fabrication of three-dimensional microfluidic channels in fused silica, using femtosecond laser micromachining, to achieve two-dimensional hydrodynamic flow focusing in either the horizontal or the vertical directions. Spatial focusing of 3 μm polystyrene particles was successfully demonstrated, showing the ability of the fabricated devices to confine microparticles within a 6 μm layer over a channel width of 420 μm and within a 5 μm layer over a channel height of 260 μm. Integration of laser-direct written optical waveguides inside a microfluidic chip and orthogonal to the channel also enabled the implementation of a dual-beam optical trap, with trapping of polystyrene microparticles using a 1550 nm beam being demonstrated.
© The Authors, published by EDP Sciences, 2024
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
