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Spirally rotating particles with structured beams generated by phase-shifted zone plates

Jila Rafighdoost, Xing Li, Yuan Zhou, Meiling Zhou, Manman Li, Shaohui Yan, and Baoli Yao

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Abstract

The emerging field of structured beams has led to optical manipulation with tremendous progress. Beyond various methods for structured beams, we use phase-shifted zone plates known as beam-shaping diffractive optical elements to generate beams whose phase exclusively or both phase and intensity are twisted along a curve. These beams can trap and guide particles on open curved trajectories for continuous motion, not necessarily requiring a closed symmetric intensity distribution. We show the feasibility and versatility of the proposed method as a promising technique in optical manipulation in which the trajectory of the spiral rotation and the rate of rotation of trapped particles can be controlled.

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Supplementary Material (8)

NameDescription
Visualization 1       Trapped microparticles guided along the outer orbit of the spiral beam. The phase-shifted parameter a=0.1 mm and the topological charge set (p1, p2) = (4, 5).
Visualization 2       Trapped microparticles guided along the inner orbit of the spiral beam. The phase-shifted parameter a=0.1 mm and the topological charge set (p1, p2) = (5, 4)
Visualization 3       Trapped microparticles guided along the inner orbit of the spiral beam. The phase-shifted parameter a=0.1 mm and the topological charge set (p1, p2) = (-5, -4);
Visualization 4       Trapped particles on spiral beams with the topological charge set (p1, p2) = (-5, -4) and different phase-shifted parameters a=0.04
Visualization 5       Trapped particles on spiral beams with the topological charge set (p1, p2) = (-5, -4) and different phase-shifted parameters a=0.06
Visualization 6       Trapped particles on spiral beams with the topological charge set (p1, p2) = (-5, -4) and different phase-shifted parameters a=0.08
Visualization 7       Trapped particles that are rotated anticlockwise by a vortex beam. The topological charge (p1, p2) = (5, 5) and phase-shifted parameters a=0.05 mm.
Visualization 8       Trapped particles that are rotated anticlockwise by a double ring vortex beam. The topological charge (p1, p2) = (5, 5) and phase-shifted parameters a=0.1 mm.

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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Figures (10)

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Equations (7)

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