花菁染料聚乙烯醇延伸膜的三阶非线性光学极化率的各向异性

Anisotropy in the third-order nonlinear optical susceptibility of the stretch-oriented cyanine-dye-doped poly(vinyl alcohol) films

采用飞秒共振简并四波混频技术,检测了花菁染料的聚乙烯醇延伸膜平行和垂直于延伸方向的三阶非线性光学极化率.结果表明:单向延伸的花菁染料的聚乙烯醇膜具有较高的三阶非线性光学极化率的各向异性.

Stretch-oriented cyanine-dye-doped poly （vinyl alcohol） （PVA） films were prepared. The third- order nonlinear optical susceptibilities of the stretch-oriented films parallel and perpendicular to the stretching direction were measured by the resonant femtosecond DFWM technique. Result shows that a high anisotropic x^（3） is observed for the uniaxially stretch-oriented cyanine-dye-doped PVA films.