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Multifunctional light beam control device by stimuli-responsive liquid crystal micro-grating structures.

J F Algorri1, P Morawiak2, D C Zografopoulos3

  • 1Photonics Engineering Group, University of Cantabria, 39005, Santander, Spain. algorrijf@unican.es.

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|August 16, 2020
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Summary
This summary is machine-generated.

A novel liquid crystal (LC) device uses indium-tin oxide (ITO) gratings to precisely control light phase. This all-in-one component generates Bessel beams, steers lasers, and creates tunable gratings with low voltage and large aperture.

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Area of Science:

  • Optics and Photonics
  • Materials Science
  • Electro-optics

Background:

  • Precise control of light phase is crucial for scientific and industrial applications.
  • Electro-optical materials, particularly liquid crystals (LCs), offer promising solutions for light modulation.
  • Existing methods often lack versatility or require complex setups.

Purpose of the Study:

  • To propose and demonstrate a novel technique for modulating the spatial phase profile of light using LCs.
  • To create a versatile, all-in-one electro-optical device with multiple functionalities.
  • To achieve precise light phase control with a simple, compact, and efficient system.

Main Methods:

  • Fabrication of a planar LC cell between two perpendicularly placed indium-tin oxide (ITO) grating microstructures.
  • Electro-optical addressing of the LC cell using microstructured electrodes.
  • Application of precisely selected voltage sources to modulate the LC-induced phase profile.

Main Results:

  • Demonstration of generating non-diffractive Bessel beams.
  • Successful implementation of laser stretching and beam steering capabilities.
  • Creation of 2D tunable diffraction gratings with the proposed device.
  • Achieved low operating voltages, large aperture, and simple voltage control.

Conclusions:

  • The proposed LC-tunable component acts as a multifunctional device for spatial light modulation.
  • The technique offers unprecedented characteristics, including low power consumption and compactness.
  • This approach opens new research avenues in electro-optical phase modulation formats.