Abstract

We discuss a simple method to generate a configurable annular vortex beam (AVB) with the maximum possible peak intensity, employing a phase hologram whose transmittance is the phase of a Bessel beam. Due to its maximum intensity, the AVB provides the optimal density of the orbital angular moment. Another attribute of the generated AVB is the relatively high invariance of the intensity profile when the topological charge is changed. We demonstrate the advantages and flexibility of these AVBs for optical trapping applications.

© 2016 Optical Society of America

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Supplementary Material (4)

NameDescription
» Visualization 1: MOV (401 KB)      Clockwise rotation of the trapped microparticles.
» Visualization 2: MOV (763 KB)      Anticlockwise rotation of the trapped microparticles.
» Visualization 3: MOV (3197 KB)      Rotation frequency of the microparticles using different integer values of topological charge.
» Visualization 4: MOV (3497 KB)      Rotation rate of the microparticles as a function of the power of the input beam.

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