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Ring-shaped optical trap based on an acousto-optic tunable spatial filter

Dmitry V. Obydennov, Konstantin B. Yushkov, and Vladimir Ya. Molchanov

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Abstract

We report on a novel, to the best of our knowledge, optical scheme of an annular optical trap based on an acousto-optic tunable spatial filter. Design of the optical trap is proposed and validated. Experimental demonstration with polystyrene microspheres includes controllable arrangement of freely floating particles into a circular pattern, aggregation, and disaggregation of the particles. Dynamical adjustment of the trapping field potential diameter is achieved by programmable frequency-swept controlling of the acousto-optic filter.

© 2021 Optical Society of America

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Supplementary Material (3)

NameDescription
Supplement 1       Supplemental materials.
Visualization 1       Particle aggregation is performed by means of a ring-shaped dynamical optical trap. The ring-shaped optical trap is based on a noncollinear acousto-optic tunable filter (AOTF), which is fed with a downswept frequency signal.
Visualization 2       Particle disaggregation is performed by means of a ring-shaped dynamical optical trap. The ring-shaped optical trap is based on a noncollinear acousto-optic tunable filter (AOTF), which is fed with an upswept frequency signal.

Data Availability

Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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