| Issue |
EPJ Web Conf.
Volume 305, 2024
6th International Conference on Applications of Optics and Photonics (AOP2024)
|
|
|---|---|---|
| Article Number | 00006 | |
| Number of page(s) | 7 | |
| DOI | https://doi.org/10.1051/epjconf/202430500006 | |
| Published online | 15 October 2024 | |
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
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