半导体学报2007，Vol.28Issue(5)：640-644,5.
掺Al的纳米Si-SiO2复合薄膜的光学非线性特性
Nonlinear Optical Properties of Al-Doped nc-Si-SiO2 Composite Films
摘要
Abstract
The nonlinear optical properties of Al-doped nc-Si-SiO2 composite films have been investigated using the time-resolved four-wave mixing technique with a femtosecond laser.The off-resonant third-order nonlinear susceptibility is observed to be 1.0×10-10 esu at 800nm.The relaxation time of the optical nonlinearity in the films is as short as 60fs.The optical nonlinearity is enhanced due to the quantum confinement of electrons in Si nanocrystals embedded in the SiO2 films.The enhanced optical nonlinearity does not originate from Al dopant because there are no Al clusters in the films.关键词
纳米Si/复合薄膜/三阶非线性/时间分辨四波混频Key words
Si nanocrystals/composite films/third-order nonlinearity/time-resolved four-wave mixing分类
数理科学引用本文复制引用
郭亨群,杨琳琳,王启明..掺Al的纳米Si-SiO2复合薄膜的光学非线性特性[J].半导体学报,2007,28(5):640-644,5.基金项目
国家自然科学基金资助项目(批准号:60336010) Project supported by the National Natural Science Foundation of China(No.60336010) （批准号:60336010）
