Multi-plane photophoretic trapping of airborne light-absorbing particles
S.A. Fomchenkov 1, 2
A.P. Porfirev, 1, 2
D.P. Porfiriev 1, 3
S. N. Khonina 1, 2
S. V. Karpeev 1, 2
1 Samara National Research University, Samara, Russia
2 Image Processing Systems Institute of RAS—Branch of the FSRC “Crystallography and Photonics” RAS, Samara, Russia
3 Lebedev Physical Institute, Samara, Russia
Abstract
In this work, we investigate the generation of a multi-linear optical trap using the Gaussian beam diffraction on the edge of a displaced cylindrical lens and demonstrated the possibility of multi-plane photophoretic trapping of airborne light-absorbing particles. The experimental trapping results were shown by observation of light scattered by the particles trapped at different levels of the generated optical trap. The effect of the laser power level tuning on multi-plane trapping of particles was also demonstrated, confirming the assumption that initial laser power affects trapping robustness, which leads to an earlier escape of smaller particles trapped in non-main light lines. All these results were experimentally confirmed and can be used for implementation of passive sorting of particles based on their physical properties.
This work was financially supported by Russian Science Foundation (grant No. 22-12-00041).
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Speaker
Alexey Porfirev
Image Processing Systems Institute of RAS—Branch of the FSRC “Crystallography and Photonics” RAS
Russia
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