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| ZnS/PVA纳米复合薄膜的制备及其非线性三光子吸收研究 | |
| 引用本文： | 陈鹤平,毕红,吴卫林,杜乐意.ZnS/PVA纳米复合薄膜的制备及其非线性三光子吸收研究[J].安徽大学学报(自然科学版),2006,30(5):56-60. |
| 作者姓名： | 陈鹤平 毕红 吴卫林 杜乐意 |
| 作者单位： | 1. 安徽大学,物理与材料科学学院,安徽,合肥,230039 2. 安徽大学,化学化工学院,安徽,合肥,230039;南京大学,固体微结构物理国家重点实验室,江苏,南京,210093 3. 安徽大学,化学化工学院,安徽,合肥,230039 |
| 基金项目： | 安徽省科技厅重点科研基金资助项目(04022075),南京大学固体微结构物理国家重点实验室开放基金资助项目(M031803) |
| 摘 要： | 采用原位复合的方法制备出厚度为20μm的聚乙烯醇(PVA)与ZnS纳米微粒复合的薄膜,利用透射电镜(TEM)和X射线衍射(XRD)研究薄膜样品的微结构性能,证明已制备出立方晶相的针状ZnS纳米晶.用Z-扫描技术研究ZnS/PVA纳米复合薄膜的非线性光学性质,发现该薄膜对532 nm纳秒脉冲激光表现出较强的非线性吸收效应,而且非线性吸收强度随入射光强的增加而减少.该非线性吸收主要由纳米ZnS的三光子吸收引起,并伴随弱饱和吸收现象发生. |
| 关 键 词： | 纳米ZnS 三光子吸收 Z-扫描 |
| 文章编号： | 1000-2162（2006）05-0056-05 |
| 收稿时间： | 2006-04-14 |
| 修稿时间： | 2006-04-14 |
Preparation and non- linear three- photon absorbing property of ZnS/PVA nanocomposite film |
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| CHEN He-ping,BI Hong,WU Wei-lin,DU Le-yi.Preparation and non- linear three- photon absorbing property of ZnS/PVA nanocomposite film[J].Journal of Anhui University(Natural Sciences),2006,30(5):56-60. | |
| Authors: | CHEN He-ping BI Hong WU Wei-lin DU Le-yi |
| Institution: | 1. School of Physics and Material Seienee,Anhui University, Hefei 230039, China; 2. School of Chemistry and Chemical Engineering, Anhui University, Hefei 230039, China; 3. National Key Laboratory of Solid State Mierostrueture, Nanjing University, Nanjing 210093, China |
| Abstract: | ZnS / Polyvinyl alcohol(PVA) nano-composite film was synthesized by in-situ synthesis method.The micro-structure of the film was characterized by X-ray diffraction(XRD) and transmission(electron) microscopy(TEM).It is found that the synthesized nanocrystallines within the film was cubic β-ZnS in needle-like shape,its average length,diameter and aspect ratio are about 36 nm,6 nm and 6,respectively.Its maximum ultra-violet absorption peak has a "blue shift" to 235.6 nm.The optical property of the composite film was investigated by using Z scanning optical instrument in the case of 532 nm,16 ns pulses of second-harmonic radiation of Nd:YAG laser,the results indicate that the synthesized ZnS nanoparticals show nonlinear three-photon absorbing optical effect,and the absorbing intensity decreases with the increasing of incident laser intensity. |
| Keywords: | ZnS nanoparticals three-photon absorbing Z scanning |
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