偶氮苯掺杂聚合物光致双折射的一维空间分布

One-Dimensional Spatial Distribution of Photo-Induced Birefringence of Azobenzene Dye-Doped Polymers

报道了偶氮苯掺杂聚合物光致双折射空间分布的实验研究.发现在光照区域外较大的范围内有双折射,证实了生色团分子的取向运动及其引起的周边分子相互运动的存在.对3 种偶氮苯染料分散红1(DR1),分散红13(DR13)和分散黄7(DY7)掺杂的聚甲基丙烯酸甲酯(PMMA)聚合物进行了定性研究.发现生色团分子的取向运动及其引起的周边分子相互运动与抽运光强度和生色团分子的大小等因素有关.

Experimental investigation of one-dimensional spatial distribution of photo-induced birefringence of azobenzene dye-doped polymers is reported. The orientational motion of chromophores and the consequential inter-molecular motion of the surrounding area are confirmed based on the spatial distribution and its evolution. It is found that orientational motion of chromophores and the consequential inter-molecular motion are dependent on the pump power and the size of the chromophores by the qualitative investigation of three kinds of azobenzene dye DR1, DR13 and DY7 doped PMMA polymers.