| 用飞秒激光脉冲研究聚合物膜中PbS超微粒的非线性光学性质 |
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| 引用本文： | 张松宾,周晓文.用飞秒激光脉冲研究聚合物膜中PbS超微粒的非线性光学性质[J].光学学报,1995,15(10):324-1328. |
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| 作者姓名： | 张松宾 周晓文 |
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| 作者单位： | 北京大学物理系，介观物理国家重点实验室，中国科学院感光化学研究所 |
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| 摘 要： | 将ＰｂＳ超微粒掺进有机物中得到ＰｂＳ／Ｆｌｅｍｉｏｎ复合膜。室温下的线性吸收光谱表明其吸收带边与体相材料相比发生明显兰移，但没有观察到激子吸收峰。用飞秒激光脉冲做光源，用泵浦－探测方法记录了样品的时间分辨光克尔效应信号，据此得到其三阶非线性极化率、响应时间等一些重要数据，并对观察到的实验现象进行了分析讨论。
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| 关 键 词： | 半导体超微粒 量子尺寸效应 膜 聚合物 硫化铅 |
| 收稿时间： | 1994/7/8 |
Femtosecond Nonlinear Response of Polymer Film Doped with Nanometer-Sized PbS Clusters |
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| Zhang Songbin,Xia Zongju,Ai Xicheng,Zou Yinghua.Femtosecond Nonlinear Response of Polymer Film Doped with Nanometer-Sized PbS Clusters[J].Acta Optica Sinica,1995,15(10):324-1328. |
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| Authors: | Zhang Songbin Xia Zongju Ai Xicheng Zou Yinghua |
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| Abstract: | We have synthesized nanometer-sized PbS clusters embedded in a new kind of polymer(Flemion) film. Their linear optical absorption spectrum was blue-shift from the bulk band-gap but no exciton peaks are abaerved. Using femtosecond laser pulses, we have recorded the time-resolved Kerr transmission signals of the films, from which we got the third-order nonlinear susceptibility and response time. The experimental data are discussed in terms of the quantum confined effect. |
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| Keywords: | semiconductor microcrystallite quantum size effect Kerr effect |
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