Abstract : during the measurement of optical nonlinearities of sample in the thin film by z - scan technique , ablating makes a hole in the thin film if the incidental laser power is too high , that will produce the error to measurement results 文摘:用单光束扫描法研究薄膜材料的非线性光学性质时，如果入射样品的激光功率过大，将会烧蚀薄膜而产生孔洞，虽然其归一化透过率曲线类似于没有烧蚀的情况，但与样品的非线性光学性质无关，因而造成测量结果错误。
The principal work in this paper is to investigate the third - order nonlinear optical properties of three new organometallic complexes with z - scan technique , and study the molecule structural vibration of these complexes . in order to further understand their nonlinear optical characters there are six chapters in this paper , which can be divided into three sections : in the first section , i . e . chapter one , the current status of the development and practical applications of nonlinear optics are introduced briefly the third - order nonlinear optical effect is introduced particularly 本文的工作主要是利用单光束z扫描技术研究了三种新型金属有机化合物的三阶非线性光学特性，并且利用拉曼光谱技术探索了这些化合物的结构振动信息，试图从结构方面更深入的了解其非线性光学性质。论文共分六章，其主要内容概括为三个部分：第一部分，即论文的第一章，简单介绍了非线性光学发展的现状以及非线性光学的现实应用和意义，着重介绍三阶非线性光学效应，用z扫描方法测量三阶非线性光学系数的方法和理论。
