قالب وردپرس درنا توس
Home / Science / New photonic liquid crystals could lead to next-generation displays and advanced photonic applications

New photonic liquid crystals could lead to next-generation displays and advanced photonic applications












( Nanowerk News ) A new technique for changing the structure of liquid crystals could lead to the development of fast-reacting liquid crystals suitable for next generation displays, e.g. For example, 3-D, augmented and virtual reality and advanced photonic applications such as mirrorless lasers, biosensors and fast / slow light generation, according to an international team of researchers from Penn State, the Air Force Research Laboratory and National Sun Yat-sen University, Taiwan ,

"The liquid crystals we work with are called blue phase liquid crystals," said Iam Choon Khoo, a professor of electrical engineering at William E. Leonhard, the author of the article. "The most important thing about this research is the basic understanding of what happens when creating a field, which has led to the development of the technique of repetitive applied field. We believe that this method is almost a universal template with which many similar types of liquid crystals and soft matter can be reconfigured. "
  Close-up of a mm-size blue-phase liquid crystal during its formation phase.
Close-up of a mm-size blue-phase liquid crystal during its formation phase. (Photo: Khoo Lab / Penn State)
Liquid crystals of the blue phase typically self-assemble into a cubic photonic crystal structure. The researchers believed that by creating other structures, they could develop properties that are not present in their current form.
After nearly two years of experimentation, they found that they could slowly move the crystals to stable and field-free orthorhombic and tetragonal structures by applying an intermittent electric field and relaxing the system between applications and dissipating the accumulated heat.
The resulting liquid crystals have a photonic bandgap that can be tuned to any location within the visible spectrum and has rapid responses required for a variety of next-generation displays and advanced photonic applications.
The addition of a polymer to the crystal could stabilize it over a wide temperature range from freezing to near boiling, compared to its typical flawless counterparts, which are stable only in a range of 5 degrees. The polymer framework also speeds up the switching behavior.
In the latest research, the team uses the findings of this study ( Nature Materials "Reconfiguration of three-dimensional liquid crystalline photonic crystals by electrostriction") to generate new crystal structures and orientations using the electric field of a laser source.

You may also be interested in these articles:


Source link