申请人:HOECHST CELANESE CORPORATION
公开号:EP0378185A2
公开(公告)日:1990-07-18
In a preferred embodiment this invention provides a second order nonlinear optical film medium which consists of a thermoplastic copolymer which has a crystallographic molecular alignment, and a net dipolar molecular orientation normal to the film plane. The crystallographic molecular alignment is formed by axial mechanical stressing, and the dipolar molecular orientation is induced by an electric or magnetic field.
Illustrative of an invention polymer is a copolymer of vinylidene fluoride and 4-[N-(10-methacroyloxydecyl)]-4′-nitrostilbene:
在一个优选的实施方案中,本发明提供了一种二阶非线性光学薄膜介质,该介质由热塑性共聚物组成,热塑性共聚物具有晶体学分子排列和法向薄膜平面的净偶极分子取向。结晶分子排列是通过轴向机械应力形成的,而偶极分子取向则是由电场或磁场诱导的。
本发明聚合物的示例是亚乙烯基氟化物和 4-[N-(10-甲酰氧基癸基)]-4′-硝基二苯乙烯的共聚物: