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Multiple-Color Reflectors Using Bichiral Liquid Crystal Polymer Films and Their Applications in Liquid Crystal
Cheng-Kai Liu1, Ming-Hsien Li2, Chi-Lun Ting3
1Department of Optics and Photonics, National Central University, Taoyuan 320, Taiwan.
Polymers
|December 22, 2020
Summary
Multiple-color reflectors were created using bichiral liquid crystal polymer films (BLCPFs). These films exhibit tunable optical properties, showing potential for advanced display and filter applications.
Area of Science:
- Materials Science
- Optics
- Polymer Science
Background:
- Bichiral liquid crystal polymer films (BLCPFs) offer unique optical properties.
- Cholesteric liquid crystals (CLCs) are key components in creating tunable optical devices.
Purpose of the Study:
- To investigate the optical properties of BLCPFs composed of alternating CLC layers.
- To simulate and analyze the reflection spectra of BLCPFs with varying pitch lengths.
Main Methods:
- Fabrication of BLCPFs using polymerizable CLCs and thin films.
- Qualitative simulation of optical properties, including reflection spectra and wavelength ranges.
- Analysis of BLCPF properties based on liquid crystal (LC) birefringence and pitch lengths.
Main Results:
- Optical properties are dependent on LC birefringence and the pitch lengths of CLC#A and CLC#B layers.
- Multiple reflection bands were observed in the BLCPFs.
- The study explored fabrication concepts using polymerizable CLCs and thin films.
Conclusions:
- BLCPFs demonstrate potential for functional color filters and asymmetrical transmission systems.
- These films can enhance color gamut and light-utilization efficiency in displays.
- The findings provide insights into designing advanced optical materials.
