中文摘要：

因为具有独特的量子效应，量子点是诸多研究领域共同关注的研究方向。在研究CdSe0．5S0．5量子点的合成基础上，对其三阶非线性光学性能开展研究。结果表明，通过制备N-油酰基-吗啡啉溶剂，获得了高品质CdSe0．5S0．5量子点的有效控制合成方法；所制备的量子点在532nm激光条件下有着非常明显的非线性光学性质，三阶非线性折射系数（n2）为-7．1×10-11esu，非线性吸收系数（β）为-3．47×10-11m／W。

英文摘要：

Because of the unique quantum effect, quantum dots （QDs） have attracted much attention in manyresearch fields. The controlled synthesis and the nonlinear optical properties of CASe.o. 5 So. 5 QDs were investigated.High-quality CdSe0. s So. 5 QDs were synthesized by a simple method with N-oleoylmorpholine used as solvent. The QDsexhibited obvious optical nonlinearity with nonlinear refractive index （nz） and absorption coefficient （β） reaching up to-7.1×10-11esu esu and -3.47×10-11m/W respectively at the laser wavelength of 532 nm.