| 气溶胶OT 修饰的PbS 纳米粒子飞秒反饱和吸收 |
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| 引用本文： | 郭林,汪浩,艾希成,杨青林,邹英华,李前树,朱鹤荪.气溶胶OT 修饰的PbS 纳米粒子飞秒反饱和吸收[J].北京理工大学学报(英文版),1999,8(1):48-54. |
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| 作者姓名： | 郭林 汪浩 艾希成 杨青林 邹英华 李前树 朱鹤荪 |
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| 作者单位： | 1. 北京理工大学材料科学研究中心,北京,100081
2. 北京大学介观物理国家重点实验室,北京,100871 |
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| 基金项目： | 国家自然科学基金，教育部高等学校博士学科点专项科研基金，中国博士后科学基金，国家博士后科学基金 |
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| 摘 要： | 目的制备表面经AOT修饰的PbS纳米微粒,测定其超快非线性光学特性. 方法利用微乳液法制备表面经AOT修饰的PbS纳米微粒并利用飞秒激光技术研究其超快光学性质. 结果观察到超快反饱和吸收过程,弛豫时间约为100fs. 结论超快反饱和吸收来源于双激子效应和捕获载流子诱导的斯塔克效应,样品表面的化学修饰环境对超快非线性光学性质有很大的影响.
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| 关 键 词： | PbS纳米微粒 气溶胶OT 超快反饱和吸收 表面化学修饰 |
| 收稿时间： | 1998/4/21 0:00:00 |
Femtosecond Induced Absorption of PbS Nanoparticles Modified by AOT |
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| GUO Lin,WANG Hao,AI Xi-cheng,YANG Qing-lin,ZOU Ying-hu,LI Qian-shu and ZHU He-sun.Femtosecond Induced Absorption of PbS Nanoparticles Modified by AOT[J].Journal of Beijing Institute of Technology,1999,8(1):48-54. |
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| Authors: | GUO Lin WANG Hao AI Xi-cheng YANG Qing-lin ZOU Ying-hu LI Qian-shu and ZHU He-sun |
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| Affiliation: | Center for Research on Materials Science, Beijing Institute of Technology, Beijing 100081;Center for Research on Materials Science, Beijing Institute of Technology, Beijing 10008;Center for Research on Materials Science, Beijing Institute of Technology, Beijing 100081;Center for Research on Materials Science, Beijing Institute of Technology, Beijing 100081;Center for Research on Materials Science, Beijing Institute of Technology, Beijing 100081;Mesoscopic Physics Laboratory, Peking University, Beijing 100871;Center for Research on Materials Science, Beijing Institute of Technology, Beijing 100081 |
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| Abstract: | Aim To prepare PbS nanoparticles modified by manoxol OT (AOT) and determine its transient nonlinear optical properties. Methods The PbS nanoparticles were prepared by using microemulsion method and the transient nonlinear optical properties were investigated with standard time resolved pump probe techniques. Results A very rapid induced absorption was investigated. The decay time of the PbS nanoparticles modified is about 100 fs. Conclusion The transient induced absorption in PbS nanoparticles modified by AOT arises from the biexciton effect and the trapped carrier induced Stark effect. The surface chemical modification environment has significant effects on the transient nonlinear optical properties. |
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| Keywords: | PbS nanoparticles AOT femtosecond induced absorption surface chemical modification |
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