利用单光束测量掺有叶绿素-α的有机聚合材料的光学非线性折射率

Nonlinear refractive index measurement of a pclymer meterial dcped with chlorophyll-α using slngle laser beam

本文研究了利用单光束纵向扫描法测量介质的光学非线性折射率n_2中,介质的线性吸收对测量结果的影响,指出样品的吸收使得纵向扫描方法的测量范围减小,测量精度降低,在实验上,利用纵向扫描法测量了一种掺有叶绿素-α的有机聚合材料的非线性折射率,获得的n_2为3.4×10^(-9)esu,对实验结果的分析表明,材料的非线性折射来源于有机材料的共轭π电子效应.

The sensitive single-beam technigue for mrasuring the nonlinear refractive index has been studisd for the cases that matorials have varied linear absosption ,It is found that the inereament of lines abserption will smear the solution of this technique and lead the sensihility lower. The experimenfal a sults of the nonlinear refractive index meamrement of a kind of polymer material deped with chlorphyll-α are also reported. The is n2≈3.4×10-9esu. Analysis shows that nonlinear refraotion is caused by π-electrons effects.