| 金属超微粒子-介质复合薄膜(Ag-BaO)的光吸收特性 |
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| 引用本文： | 李丽君,吴锦雷.金属超微粒子-介质复合薄膜(Ag-BaO)的光吸收特性[J].光学学报,1998,18(11):551-1555. |
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| 作者姓名： | 李丽君 吴锦雷 |
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| 作者单位： | 北京大学电子学系 |
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| 摘 要： | 测量了真空热蒸发沉积法制备的贵金属Ａｇ超微粒子－介质（ＢａＯ）复合薄膜近紫外到可见的吸收光谱。这种薄膜的透射电镜显微像表明，Ａｇ在介质中形成了较均匀的超微粒子，粒径为１５ｎｍ。观察到吸收谱在４１０ｎｍ处有明显的等离子激元共振吸收峰，这是电偶极振荡的吸收。与以往文献的结果做了比较，讨论了吸收光谱对金属微粒尺寸的依赖关系。
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| 关 键 词： | 金属超微粒子，薄膜，光吸收 |
| 收稿时间： | 1997/8/19 |
Absorption Spectrum of Metal Ultrafine Particles Matrix Composite Thin Film (Ag BaO) |
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| Li Lijun,Wu Jinlei.Absorption Spectrum of Metal Ultrafine Particles Matrix Composite Thin Film (Ag BaO)[J].Acta Optica Sinica,1998,18(11):551-1555. |
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| Authors: | Li Lijun Wu Jinlei |
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| Abstract: | The ultraviolet visible photoabsorption spectrum of the Ag particles matrix (BaO) thin film deposited by vacuum evaporation was measured. The transmission electron micrograph indicated that in the matrix Ag formed particles with a mean diameter of 15 nm. There is a clear absorption peak of surface plasmon mode at 410 nm wave length. This is the absorption of electric dipole oscillation. The results were compared with those in previous literatures. The dependence of absorption on the particle size was discussed. |
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| Keywords: | metal ultrafine particles thin film photoabsorption |
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