在聚合物表面刻写方格子的新方法及理论研究

为了提高制作偶氮苯微结构的实验技术，在偶氮苯聚合物的光致异构和光致取向特性的基础上，利用两激光束的新实验方案，运用比较简便的分步制作的方法，成功的在偶氮苯功能化聚合物薄膜表面“刻写”出二维的正方格子结构。提出了一个新的光异构取向场理论：在两束偏振方向互相垂直的偏振光照射下，偶氮苯聚合物表面光栅的形成是光异构取向场的干涉的结果，并对实验现象进行了解释。用计算机对实验结果进行了模拟，将模拟结果与实验结果进行了比较，结果表明计算机模拟将会更加有利于偶氮苯聚合物微结构的设计和制作。

The Study of Square Microstructure on Polymer Films Made with a Novel Step-by-Step Procedure

In order to improve the technique of making microstructure on azobenzene polymer film, a new experimental method is presented, based on photoinduced isomerization and photoinduced birefringence of an amorphous copolymer containing azobenzene groups. Two-dimensional square microstructure is written on the azobenzene functional polymers film by two laser beams in a step-by-step procedure, so the pattern can be controlled in a convenient way. A new theory of photoinduced isomerization and re-orientation field is put forward. When azobenzene polymer film is irradiated by two beams and the polarization of these two beams are perpendicular, photoinduced isomerization and re-orientation field will occur and the interference can also take place. And the interference induces the formation of the grating on the surface of azobenzene polymer film. The results of the experiment and computer simulation are compared.