单体官能度对聚合物分散液晶盒中形成的可切换全息光栅的影响。

Effects of monomer functionality on switchable holographic gratings formed in polymer-dispersed liquid-crystal cells.

作者信息

Ramsey Robert A, Sharma Suresh C

机构信息

Department of Physics, University of Texas at Arlington, Arlington, TX 76019, USA.

出版信息

Chemphyschem. 2009 Feb 23;10(3):564-70. doi: 10.1002/cphc.200800512.

DOI:10.1002/cphc.200800512

PMID:19156798

Abstract

We investigate the effects of monomer functionality on the formation and switching characteristics of holographic transmission gratings in polymer-dispersed liquid-crystal cells fabricated by using the 633 nm wavelength of an He-Ne laser. We present results for the microstructure, diffraction efficiency eta, and switching characteristics of gratings formed with acrylate monomers of functionalities ranging from 2 to 4. The microstructure and diffraction efficiency are sensitive to functionality; both improve with increasing functionality. For functionalities of 2.5 or more, eta approaches 34% and can be switched off with electric fields of about 20 MV m(-1).

摘要

我们研究了单体官能度对采用氦氖激光器633纳米波长制备的聚合物分散液晶盒中全息透射光栅的形成及开关特性的影响。我们给出了由官能度范围为2至4的丙烯酸酯单体制备的光栅的微观结构、衍射效率η及开关特性的结果。微观结构和衍射效率对官能度敏感；二者均随官能度增加而改善。对于官能度为2.5或更高的情况，η接近34%，并且可以用约20 MV m⁻¹的电场将其关闭。