Paper
4 May 2021 Airy beams for laser manipulation of airborne light-absorbing particles
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Abstract
We investigate laser manipulation of airborne light-absorbing particles trapped by two-dimensional Airy beams (AiBs). The unique properties of these beams, namely propagation along accelerating trajectories and self-healing allowed us to demonstrate the possibility of trapped particles to bend around obstacles. Previously, only straight-forward propagating laser beams were used for the laser guiding of airborne light-absorbing particles. For example, Gaussian, optical vortices, or conical beams. Such straight-forward propagating laser beams can only push or pull the trapped particles along the straight trajectories, thereby limiting the use of laser beams to cases of the manipulation of the particles which are in a line of sight. In this article, the trajectories of the particles trapped using a straight-forward propagating Bessel beam and AiB were compared and the experiments showed the possibility of using AiBs to guide particles in both directions from and toward the laser source depending on the parameters of the trapped particles. We believe that the use of AiBs can significantly expand the use of photophoresis-based laser manipulation and will allow the non-touch trapping and delivery of light-absorbing particles from various reservoirs and areas of space that are "around the corner" and hidden by an obstacle in the air.
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A. P. Porfirev "Airy beams for laser manipulation of airborne light-absorbing particles", Proc. SPIE 11846, Saratov Fall Meeting 2020: Laser Physics, Photonic Technologies, and Molecular Modeling, 118460N (4 May 2021); https://doi.org/10.1117/12.2587674
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