用Z扫描方法测量掺C_(60)有机改良介质的非线性折射率  

Measurement of the Nonlinearities of C 60 Doped Ormosil with Z Scan Method

作　　者：夏海平[1] 武四新[1] 余保龙[1] 朱从善[1] 干福熹[1] 

机构地区：[1]中国科学院上海光学精密机械研究所

出　　处：《光学学报》1998年第2期204-207,共4页Acta Optica Sinica

基　　金：国家自然科学基金

摘　　要：用Ｚ扫描方法和波长１．０６４μｍ、脉宽１５０ｐｓ的锁模激光测定了Ｃ６０／ＮＨ２－（ＣＨ２）３－Ｓｉ（ＯＣ２Ｈ５）３（简称Ｃ６０／ＫＨ５５０）溶胶和凝胶的三阶光学非线性系数。理论拟合曲线计算得出，溶胶复合材料的非线性折射率ｎ２＝５．６×１０－１２ｅｓｕ，经两天凝结之后的凝胶复合材料的ｎ２＝６．２×１０－１２ｅｓｕ。在相同的激光强度下溶胶和凝胶的不同透过率归因于溶胶液体对激光的非线性散射。The optical nonlinearities of C 60 /NH 2 (CH 2) 3 Si(OC 2H 5) 3 sol and gel excited by a Nd∶YAG laser with 150 ps pulse duration, 1.06 μm wavelength and 1 Hz repeation were measured using Z scan technique. Theoretical fits from the data give the value of n 2=5.6×10 -12 esu for the sol and 6.2×10 -12 esu for the gel. In addition, the more higher laser transmission of the gel at the focus than that of the sol was attributed to the strong nonlinear scattering of the sol.

关 键 词：Z扫描法 溶胶 凝胶 碳60 非线性折射率 有机介质 

分 类 号：O635.1[理学—高分子化学] O621.22[理学—化学]