Abstract

We present a method of shaping three-dimensional (3D) vector beams with prescribed intensity distribution and controllable polarization state variation along arbitrary curves in three dimensions. By employing a non-iterative 3D beam-shaping method developed for the scalar field, we use two curved laser beams with mutually orthogonal polarization serving as base vector components with a high-intensity gradient and controllable phase variation, so that they are collinearly superposed to produce a 3D vector beam. We experimentally demonstrate the generation of 3D vector beams that have a polarization gradient (spatially continuous variant polarization state) along 3D curves, which may find applications in polarization-mediated processes, such as to drive the motion of micro-particles.

© 2017 Optical Society of America

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Supplementary Material (6)

NameDescription
» Visualization 1       Intensity evolving of vector tilted ring during propagation captured by moving CCD along the z-direction in the focal region and without polarizer.
» Visualization 2       Intensity evolving of vector tilted ring during propagation captured by moving CCD along the z-direction in the focal region and with polarizer.
» Visualization 3       Intensity evolving of vector tilted ring during propagation captured by moving CCD along the z-direction in the focal region and with polarizer.
» Visualization 4       3D beam’s intensity evolving during propagation captured by moving CCD along the z-direction in the focal region and without polarizer.
» Visualization 5       3D beam’s intensity evolving during propagation captured by moving CCD along the z-direction in the focal region and without polarizer.
» Visualization 6       3D beam’s intensity evolving during propagation captured by moving CCD along the z-direction in the focal region and without polarizer.

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Figures (5)

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Equations (6)

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