掺Al的纳米Si-SiO2复合薄膜的光学非线性特性

采用时间分辨四波混频方法,用钛宝石飞秒激光器测量了掺Al的纳米Si-SiO2复合薄膜的光学非线性特性.得到薄膜非共振三阶非线性极化系数为1.0e-10esu,弛豫时间为60fs.分析认为薄膜的光学非线性增强来源于SiO2镶嵌的纳米Si中电子的量子限制效应,而不是来源于Al杂质,这是因为Al易被

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"掺(2的纳米-*G-*F@复合薄膜的光学非线性特性

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M华侨大学信息科学与工程学院 泉州!WK!$MM !中国科学院半导体研究所 北京!M$$$"W

摘要 采用时间分辨四波混频方法 用钛宝石飞秒激光器测量了掺08的纳米+HR+H-!复合薄膜的光学非线性特

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性9得到薄膜非共振三阶非线性极化系数为M 弛豫时间为K分析认为薄膜的光学非线性增强来源`$cM$?BC$JB9而不是来源于0这是因为0薄膜中没有形成0于+H-H中电子的量子限制效应 8杂质 8易被氧化 8!镶嵌的纳米+团簇9

关键词 纳米+ 复合薄膜 三阶非线性 时间分辨四波混频H

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