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Stretchable Blue Phase Liquid Crystal Lasers with Optical Stability Based on Small-Strain Nonlinear 3D Asymmetric
Yanqing Chen1,2, Chenglin Zheng1,2, Wenjie Yang1,2
1CAS Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.
Advanced Materials (Deerfield Beach, Fla.)
|January 27, 2025
Summary
This study presents a stable, stretchable laser using blue phase liquid crystal elastomers (BPLCEs). The novel BPLCE laser maintains optical quality under strain and wide temperature variations, enabling flexible optoelectronics.
Area of Science:
- Materials Science
- Optoelectronics
- Polymer Science
Background:
- Blue phase liquid crystal (BPLC) lasers offer high optical quality and tunability.
- Challenges exist in maintaining optical stability of BPLC elastomer (BPLCE) lasers under mechanical strain and temperature fluctuations.
Purpose of the Study:
- To develop a stretchable laser based on a novel BPLCE.
- To enhance the optical stability of BPLCE lasers during stretching and across a wide temperature range.
Main Methods:
- Fabrication of a BPLCE with combined partially and fully crosslinked networks.
- Characterization of laser performance under varying strain (up to 220%) and temperature (-180 to 70 °C).
- Analysis of the BPI lattice deformation mechanism during stretching.
Main Results:
- The developed BPLCE laser exhibits a single-peak output with minimal lasing shift (44.429 nm at 32% strain).
- The laser operates effectively across a broad temperature range (-20 to 100 °C) and demonstrates excellent thermal stability (< ±10 nm stopband shift from -180 to 70 °C).
- Nonlinear 3D asymmetric deformation of the BPI lattice stabilizes the body-centered cubic structure under low strain (<40%).
Conclusions:
- The novel BPLCE design significantly improves optical stability under mechanical and thermal stress.
- The stretchable laser demonstrates potential for flexible optoelectronics, including morphology sensing and 3D mechanical perception.
- This work paves the way for advanced applications of BPLCEs in wearable devices and sensors.
