摘要
用 Z-扫描方法在 532 nm波长测量了共轭高聚物 PPQ( polyphenylquinoxalines)薄膜的三阶光学非线性参数 ,发现其较强的非线性 (双光子 )吸收系数β≈ 0 .59cm/ MW。同时得到 Kerr系数n2 ≈ 9.5× 10 -10 esu,与用其他方法的测量结果较好地吻合。
Measurements on the third order optical nonlinearities of the conjugated polymeric cast film of PPQ (polyphenylquinoxalines) were performed based on the so called Z-scan method using a frequency doubled mode-locked Nd∶YAG laser with low repetition rate. The nonlinear absorptive coefficient β=0.59 cm/MW, was obtained for PPQ, in addition, the measured nonlinear refractive index coefficient γ=2.4×10 -12 cm2/W was in a good agreement with the previously reported value.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2000年第12期1118-1122,共5页
Chinese Journal of Lasers
基金
国家自然科学基金! (批准号 :1980 4 0 0 3)
国家博士后基金
复旦大学青年基金
