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偶氮染料及其金属络合物的三阶非线性光学性质研究

Keywords: 飞秒,偶氮染料,超外差,光克尔效应,三阶非线性.

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Abstract:

利用飞秒超外差光克尔方法测量了一种偶氮染料(噻唑-偶氮-间二乙氨苯酚)及其Cu和Co络合物的647mm波长三阶非线性光学系数的实部,所得的结果全是负值.发现金属络合物中非线性光学特性巨大的增强.利用一个二能级模型,将增强的机制归结为由于金属络合物中电子的离域化导致的两个效应,即单光子共振的增强以及跃迁态之间偶极差的消弱,在Co络合物中得到了分子有效二阶超极化率γeff为10-29esu.

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