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Dynamic multilevel spiral phase plate generator.

M Caño-García1, X Quintana1, J M Otón1

  • 1CEMDATIC, E.T.S.I Telecomunicación, Universidad Politécnica de Madrid, Av. Complutense 30, 28040, Madrid, Spain.

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This summary is machine-generated.

This study presents a reconfigurable multi-level spiral phase plate with a liquid-crystal design. The device allows dynamic control of topological charge for versatile optical applications.

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Area of Science:

  • Optics and Photonics
  • Materials Science

Background:

  • Spiral phase plates (SPPs) are crucial optical elements for generating vortex beams.
  • Existing SPPs often lack dynamic tunability and high fill factors.

Purpose of the Study:

  • To design and characterize a reconfigurable multi-level spiral phase plate.
  • To demonstrate dynamic control over the topological charge of generated vortex beams.

Main Methods:

  • Fabrication of a pie-shaped liquid-crystal structure with 24 independently controlled slices using maskless laser ablation lithography.
  • Characterization of the device's electro-optical performance at 632.8 nm.
  • Comparison of experimental results with simulation predictions.

Main Results:

  • Achieved an unprecedented high fill factor in the manufactured electro-optical cell.
  • Demonstrated dynamic reconfiguration of the topological charge, with selectable values including 1, 2, 3, 4, 6, 8, and 12.
  • Observed excellent agreement between experimental measurements and simulation results.

Conclusions:

  • The developed reconfigurable SPP offers dynamic control over topological charge.
  • The device is adaptable for various wavelengths in the visible and near-infrared spectrum.
  • This technology holds promise for advanced optical manipulation and communication systems.