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Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets
Published on: May 15, 2017
Surface-polymer stabilized liquid crystals with dual-frequency control.
Amalya Minasyan1, Tigran Galstian
1Center for Optics, Photonics and Laser, Department of Physics, Engineering Physics and Optics, Laval University, Québec, Canada.
Applied Optics
|August 6, 2013
Summary
Dual-frequency control enhances liquid crystal (LC) light scattering and polarization dependence in polymer-stabilized structures. This method improves optical performance without significantly reducing the device
Area of Science:
- Materials Science
- Optoelectronics
- Polymer Chemistry
Background:
- Surface polymer stabilized liquid crystal (LC) structures are crucial for advanced display technologies.
- Controlling LC alignment and photopolymerization is key to optimizing device performance.
Purpose of the Study:
- To investigate the impact of dual-frequency control on the electro-optic properties of surface polymer stabilized LC devices.
- To assess the effectiveness of high-frequency electric fields in orienting LC molecules during reactive mesogen (RM) photopolymerization.
Main Methods:
- Fabrication of LC cells with dual-frequency control capabilities.
- Utilizing high-frequency electric fields to induce negative dielectric torque for LC alignment.
- Photopolymerization of thin reactive mesogen (RM) films on cell substrates.
- Electro-optic characterization to evaluate light scatter modulation and polarization dependence.
Main Results:
- Dual-frequency control significantly improved the contrast of light scatter modulation.
- Enhanced polarization dependence was observed with the dual-frequency control method.
- No significant reduction in the full excitation-relaxation-excitation cycle duration was achieved.
Conclusions:
- Dual-frequency control is an effective strategy for enhancing the optical performance of surface polymer stabilized LC devices.
- The technique offers improved contrast and polarization dependence, crucial for display applications.
- Further research may be needed to optimize response times alongside optical improvements.
