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Electrically controlled white laser emission through liquid crystal/polymer multiphases.

Alina Adamow1,2, Adam Szukalski2, Lech Sznitko1

  • 11Faculty of Chemistry, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland.

Light, Science & Applications
|March 5, 2020
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel white laser using a polymer matrix with liquid crystals and organic chromophores. This tunable laser, controllable by electric fields, offers a new generation of broadband light sources.

Keywords:
Liquid crystalsPolymersSolid-state lasers

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Area of Science:

  • Materials Science
  • Optoelectronics
  • Photonics

Background:

  • White lasers are gaining importance due to their high beam brightness and intensity modulation.
  • Existing white laser technologies face challenges in tunability and control.

Purpose of the Study:

  • To introduce a novel white laser device.
  • To demonstrate tunable lasing emission from blue to red.
  • To enable low-voltage electric field control of white laser intensity.

Main Methods:

  • Fabrication of a white laser using a polymer matrix with liquid crystals and organic chromophores.
  • Utilizing a multifunctional phase-separation system for optical activity.
  • Optical excitation and application of an external electric field for control.

Main Results:

  • Achieved white laser emission with an optical excitation threshold of approximately 12 mJ/cm².
  • Demonstrated tunable lasing emission across the blue to red spectrum.
  • Showcased low-voltage (≤10 V) external electric field control of emission intensity.

Conclusions:

  • The developed white laser leverages a unique phase-separated polymer-liquid crystal system.
  • Tunable and electrically controllable white laser emission is achieved.
  • This technology holds potential for next-generation broadband light sources in various applications.