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Related Experiment Videos

Azocarbazole Polymethacrylates as Single-Component Electrooptic Materials

Barrett1, Choudhury, Natansohn

  • 1Department of Chemistry, Queen's University, Kingston, Ontario, Canada K7L 3N6, and Department of Physics, Royal Military College, Kingston, Ontario, Canada K7K 5L0.

Macromolecules
|July 29, 1998
PubMed
Summary

Researchers developed multifunctional polymers with electrooptic and photoconductive properties. These materials enable reversible photoinduced birefringence and photorefractive grating inscription, with performance influenced by chromophore mobility.

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Optoelectronics

Background:

  • Azobenzene and carbazole-containing polymers offer multifunctional properties.
  • Electrooptic activity and photoconductivity are key for advanced optical applications.

Purpose of the Study:

  • To synthesize and characterize amorphous polymers integrating electrooptic and photoconductive functionalities.
  • To investigate the impact of chromophore mobility on photoinduced birefringence and photorefractive properties.
  • To evaluate the potential of these polymers for optical data storage and processing.

Main Methods:

  • Synthesis of amorphous azobenzene and carbazole-containing polymers with varying methylene spacer lengths.
  • Fabrication of thin films for optical measurements.

Related Experiment Videos

  • Photoinduced birefringence measurements using polarized light.
  • Photorefractive diffraction grating inscription under an electric field.
  • Two-beam optical coupling gain measurements.

    • Main Results:

    • Polymers demonstrated reversible photoinduced birefringence and photorefractive grating inscription.
    • Photoinduced orientational order, photoconductivity, and photorefractive gain decreased with increasing spacer length.
    • A birefringence of 0.065 was achieved in high glass transition temperature polymers with a fast time constant (<0.8 s).
    • A two-beam optical gain of 0.024 µm⁻¹ was observed, though surpassed by absorption losses.

    Conclusions:

    • The synthesized polymers are suitable for photoinducing birefringence and creating photorefractive gratings.
    • Chromophore mobility, controlled by spacer length, significantly influences optical performance.
    • These multifunctional polymers show promise for optoelectronic applications, with further optimization needed to overcome absorption losses.