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New liquid crystal photons can lead to the next generation



  New photonic liquid crystals may lead to the emergence of the next generation of displays
Close image of a mm-phase blue crystal liquid during its formation stage. Credit: Khoo Lab, Penn State

A new technique for changing the structure of liquid crystals may lead to the development of fast-response liquid crystals suitable for next-generation displays ̵

1; 3-D, augmented and virtual reality – and advanced photonic applications such as mirrorless lasers, bio-sensors and rapid / slow light generation, according to an international team of researchers at Penn State, the Air Force Research Laboratory, and Sun Yatsen National University, Taiwan.


"The liquid crystals we work with are called blue-phase liquid crystals," says Iam Choon Khoo, professor of electrical engineering at William E. Leonhardt, who is the author of this article. "Most important in this research is a fundamental understanding of what happens when you apply a field that has led to the development of repetitive applied techniques. We believe that this method is an almost universal template that can be used to reconfigure many similar types of liquid crystals and soft matter. "

Blue phase liquid crystals usually self-assemble into a cubic photonic crystal structure. Researchers believed that by creating other structures, they could develop properties that are not present in their present form. After nearly two years of experiments, they understood that by applying an intermittent electric field and allowing the system to relax between applications and dissipate the accumulated heat, they can slowly decompose the crystals into stable and fieldless orthorhombic and tetragonal structures.

Obtained Liquid crystals show a photonic band of the band that can be adapted anywhere in the visible spectrum and have the fast reactions required for various next-generation displays and advanced photonic applications. to near boiling point compared to their typical virgin counterparts, which are stable only in the 5 degree range.

In the most recent studies, the team applied what was learned in this study to create new crystal structures and orientations using an electric field from a laser source.

Paper, "Reconfiguration of 3D Liquid Crystals by Electrostriction," published online this week in Nature Materials .


Researchers synthesize new liquid crystals that allow directional transmission of electricity


More information:
Duan-Yi Guo et al, Reconfiguration of 3D Liquid Crystal Crystals by Electrostriction, Nature Materials (2019). DOI: 10.1038 / s41563-019-0512-3

Provided by
Pennsylvania State University
Reference :
New Photonic Liquid Crystals May Lead to Next Generation (2019, November 8)
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from https://phys.org/news/2019-11-photonic-liquid-crystals-next-generation.html

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