JOURNAL ARTICLE
含三苯胺聚希夫碱的三阶光学非线性极化率
Year: 2006 Journal: Science in China Series B-Chemistry (in Chinese) Vol: 36 (5)Pages: 404-410 Publisher: Science China Press
Abstract
设计合成并表征了新颖的具有三阶非线性光学性能的含有富电子结构单元的共轭聚希夫碱(PolySchiff base, PSB), 用Z-扫描技术研究了目标产物的三阶非线性特性, 测定了目标产物吡咯烷酮(NMP)溶液的三阶非线性折射率及非线性吸收率, 在波长为532 nm的Nd-YAG激光作用下, 得到非线性折射率n2 = -1.23×10-10 esu; Reχ(3) = -3.06×10-12 esu. 非线性吸收系数b = 3.63 10-10 m/W, Imχ(3) = 1.15 10-11 esu, χ(3) = 1.19 10-11 esu, 在已知的材料中显示出较大的值. 由于n2值为负数, PSB是自散焦材料. 表明PSB具有较强的三阶非线性光学性能, 有较大的应用前景. 用量子化学计算的方法对其电子结构, 前线分子轨道, χ(3)进行了理论计算, 并讨论了之间的关系.
Keywords:
Physics
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Topics
Luminescence Properties of Advanced Materials
Physical Sciences → Materials Science → Materials Chemistry
Photorefractive and Nonlinear Optics
Physical Sciences → Physics and Astronomy → Atomic and Molecular Physics, and Optics
Solid-state spectroscopy and crystallography
Physical Sciences → Materials Science → Materials Chemistry
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