Abstract

The inclusion of thermal effects in optical manipulation has been explored in diverse experiments, increasing the possibilities for applications in diverse areas. In this Letter, the results of combined optical and thermal manipulation in the vicinity of a highly absorbent hydrogenated amorphous silicon layer, which induces both the generation of convective currents and thermophoresis, are presented. In combination with the optical forces, thermal forces help reduce the optical power required to trap and manipulate micrometric polystyrene beads. Moreover, the inclusion of these effects allows the stacking and manipulation of multiple particles with a single optical trap along with the beam propagation, providing an extra tool for micromanipulation of a variety of samples.

© 2020 Optical Society of America

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Supplementary Material (2)

NameDescription
» Visualization 1       In this video, we observe two different particles. The one on the topis immersed in the chamber containing the thin a:Si:H film and the one on the bottom is in the chamber without thin film.
» Visualization 2       In this video, we can observe the trapping, stacking, and manipulation of 4 polystyrene microparticles.

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Equations (8)

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