PLT薄膜的制备及其非线性光学性能

PREPARATION AND NONLINEAR OPTICAL PROPERTY OF PLT THIN FILMS

用金属有机物热分解法（MOD法）制备了含镧PLT薄膜，用Z－scan技术测试其非线性光学性能.结果表明：低镧（≤25％，摩尔百分数）的PLT薄膜下显示非线性光学效应；高镧的PLT薄膜非线性光学效应较强．PLT30薄膜的非线性折射率高达0．3μesu（静电单位）．

The different stoichiometric PLT thin films on quartz substrate were prepared by the MOD method. Its nonlinear optical properties were studied by means of Z-scan technique. The results show that the nonlinear optical effects of low La content (<25%) PLT films are not obserbed. The PLT 30 film of high La content has strong nonlinear optical effect. It has nonlinear refractive index as high as 0.3μesu,which will become a candidate material for nonlinear optics.