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Temperature-Tunable Heliconical and Ferroelectric Nematics for White Lasing.

Alina Barbara Szukalska¹, Jakub Karcz², Jakub Herman²

¹Soft Matter Optics Group, Wroclaw University of Science and Technology, Wyb. Wyspianskiego 27, Wroclaw, 50-370, Poland.

Advanced Materials (Deerfield Beach, Fla.)

|September 6, 2025

Summary

Researchers demonstrate temperature-tunable lasing in novel ferroelectric nematic chiral structures (N_TBF phase) and ferroelectric nematic (N_F) phases. This breakthrough enables compact multicolor and white lasers, advancing laser and display technologies.

Keywords:

ferroelectric nematic liquid crystals multicolor lasing polar self‐assembly spontaneous symmetry breaking white fluorescence white lasing

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High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal

High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal

Published on: October 31, 2019

Area of Science:

Materials Science
Optoelectronics
Condensed Matter Physics

Background:

Nematic liquid crystals (LCs) are foundational in optoelectronics but have seen limited innovation.
Recent discoveries include the ferroelectric nematic (N_F) phase (2017) and chiral ferroelectric twist-bend nematic (N_TBF) structures (2024).
LCs serve as matrices for luminescent dyes, enabling field-controlled emission tuning.

Purpose of the Study:

To investigate temperature-tunable lasing in the N_TBF phase using commercial dyes.
To explore the integration of N_TBF and N_F phases for multicolor and white laser generation.
To introduce spontaneously formed emissive fibers from the N_TBF phase and demonstrate voltage-dependent lasing intensity in the N_F phase.

Main Methods:

Doping commercial dyes into an LC mixture exhibiting the N_TBF phase within 34-43.3 °C.
Utilizing N_TBF and N_F phases in a single device for laser applications.
Fabricating and characterizing spontaneously formed emissive fibers from the N_TBF phase.
Measuring voltage-dependent lasing intensity in N_F phase LC cells.

Main Results:

Demonstrated pioneering temperature-tunable lasing within the N_TBF phase's low-temperature range.
Achieved multicolor and white laser output by combining lasing characteristics of N_TBF and N_F phases.
Introduced novel spontaneously formed emissive fibers from the N_TBF phase.
Observed a significant voltage-dependent increase in lasing intensity within the N_F phase.

Conclusions:

Simple molecules can form complex systems with significant optoelectronic functionalities.
The N_TBF and N_F phases offer a promising platform for advanced laser and display technologies.
Findings pave the way for applications in compact lasers, tunable displays, and Li-Fi communication.