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A Gaussian to Vector Vortex Beam Generator with a Programmable State of Polarization.

Jacek Piłka1, Michał Kwaśny1, Adam Filipkowski2,3

  • 1Faculty of Physics, Warsaw University of Technology, Koszykowa 75, 00-662 Warsaw, Poland.

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|November 11, 2022
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Summary

This study introduces a novel optical device that converts polarized Gaussian beams into tunable optical vortices. The compact and electrically steerable device offers a promising alternative for various optical applications.

Keywords:
beam polarization conversionoptical vorticesstructured light polarization

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Area of Science:

  • Optics and Photonics
  • Materials Science

Background:

  • Optical vortices are crucial for applications like optical trapping and information processing.
  • Existing methods for generating optical vortices often involve bulky or complex components.

Purpose of the Study:

  • To develop a compact and tunable device for converting polarized Gaussian beams into optical vortices.
  • To demonstrate a new approach using liquid crystals and nanotube-based phase plates.

Main Methods:

  • Fabrication of a nano-spherical phase plate from two types of glass nanotubes.
  • Integration of the phase plate with three specially prepared nematic liquid crystal cells.
  • Characterization of the device's ability to generate optical vortices from a polarized Gaussian beam.

Main Results:

  • The device successfully generates high-quality optical vortices with tunable polarization states.
  • The generated optical vortex possesses multiple polarization states from a uniformly polarized input Gaussian beam.
  • The device exhibits small size and simple operation.

Conclusions:

  • The proposed device is a promising alternative to passive vortex retarders and spatial light modulators.
  • Its electrical steering capability allows easy integration into laboratory and industrial systems.
  • This technology advances the generation of tunable optical vortices.