標題: | Cholesteric liquid crystal devices with nanoparticle aggregation |
作者: | Jeng, Shie-Chang Hwang, Shug-June Hung, Yu-Hsiang Chen, Sheng-Chieh 影像與生醫光電研究所 Institute of Imaging and Biomedical Photonics |
公開日期: | 11-十月-2010 |
摘要: | A broadband cholesteric liquid crystal (CLC) device with a multi-domain structure is demonstrated by using an aggregation of polyhedral oligomeric silsesquioxane (POSS) nanoparticles in the CLC layer. The aggregation pattern of the self-assembled POSS nanoparticles depends on the concentration of POSS doped in the mixture of POSS/CLC and the cooling rate of the mixture from a temperature higher than the clear point. POSS-induced changes in the bulk and surface properties of the cholesteric cells, such as a promotion of homeotropic alignment, help to form a cholesteric structure with a broadband reflection of light; the latter can be used for improvement of bistable CLC devices. A higher POSS concentration and a higher cooling rate both improve the appearance of the black-white CLC device. (C) 2010 Optical Society of America |
URI: | http://dx.doi.org/10.1364/OE.18.022572 http://hdl.handle.net/11536/32079 |
ISSN: | 1094-4087 |
DOI: | 10.1364/OE.18.022572 |
期刊: | OPTICS EXPRESS |
Volume: | 18 |
Issue: | 21 |
起始頁: | 22572 |
結束頁: | 22577 |
顯示於類別: | 期刊論文 |