標題: Broadband cholesteric liquid crystal devices with poly(N-vinyl carbazole) microstructures
作者: Hu, Jia-Wei
Chen, Tai-An
Jeng, Shie-Chang
光電系統研究所
影像與生醫光電研究所
Institute of Photonic System
Institute of Imaging and Biomedical Photonics
關鍵字: thermally induced phase separation;cholesteric liquid crystal;poly-domain structure;broadband
公開日期: 2-Jan-2015
摘要: The particular thermally induced phase separation (TIPS) method was developed by using poly(N-vinyl carbazole) (PVK) dissolved in liquid crystal (LC) layer recently. Permanent scattering is produced via the particular TIPS due to the formation of poly-domain LCs. In this work, we applied the particular TIPS to a conventional cholesteric LC (CLC) device. A broadband CLC device with a poly-domain structure was demonstrated by using the particular TIPS of CLC and PVK. The CLC device fabricated by two indium tin oxide glass substrates coated with PVK films generated the rough PVK layers and microstructures when the device was cooled from a temperature higher than the clear point of CLCs. The produced poly-domain planar texture of CLCs still preserved the bistability. A high cooling rate and PVK concentration both increased the reflection bandwidth of the CLC devices.
URI: http://dx.doi.org/10.1080/02678292.2014.960492
http://hdl.handle.net/11536/124217
ISSN: 0267-8292
DOI: 10.1080/02678292.2014.960492
期刊: LIQUID CRYSTALS
Volume: 42
起始頁: 52
結束頁: 56
Appears in Collections:Articles