| 掺Ag纳米颗粒的BaTiO3复合薄膜的非线性光学特性 |
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| 引用本文： | 杨 光,陈正豪.掺Ag纳米颗粒的BaTiO3复合薄膜的非线性光学特性[J].物理学报,2007,56(2):1182-1187. |
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| 作者姓名： | 杨 光 陈正豪 |
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| 作者单位： | (1)武汉光电国家实验室激光科学与技术研究部,华中科技大学,武汉 430074；中国科学院物理研究所光物理开放实验室,北京 100080; (2)中国科学院物理研究所光物理开放实验室,北京 100080 |
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| 基金项目： | 国家自然科学基金(批准号：5001161952)资助的课题. |
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| 摘 要： | 通过准分子激光(XeCl, 308 nm, 20 ns)在MgO(100)单晶衬底上制备了不同掺杂浓度的Ag:BaTiO3纳米复合薄膜,通过X射线衍射和X射线光电子能谱对薄膜的结构和组分进行了表征.在430 nm和470 nm附近观测到了不同浓度Ag纳米颗粒引起的等离子体吸收峰,通过z扫描技术对复合薄膜的三阶非线性光学特性进行了测量,并对其光学非线性的增强机制进行了讨论.
关键词：
金属纳米复合薄膜
激光沉积
非线性光学
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| 关 键 词： | 金属纳米复合薄膜 激光沉积 非线性光学 |
| 文章编号： | 1000-3290/2007/56(02)/1182-06 |
| 收稿时间： | 2006-01-17 |
| 修稿时间： | 01 17 2006 12:00AM |
Large optical nonlinearities in Ag-doped BaTiO3 nanocomposite films |
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| Yang Guang and Chen Zheng-Hao.Large optical nonlinearities in Ag-doped BaTiO3 nanocomposite films[J].Acta Physica Sinica,2007,56(2):1182-1187. |
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| Authors: | Yang Guang and Chen Zheng-Hao |
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| Institution: | Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China;Laboratory of Optical Physics, Institute of Physics, Chiaese Academy of Sciences, Beijing 100080, China |
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| Abstract: | Ag-doped BaTiO3 nanocomposite films have been synthesized on MgO substrates by excimer laser deposition. X-ray diffraction was used to characterize the structure and crystallinity of the films. The Ag chemical band and concentrations in the composite films were determined by X-ray photoelectron spectroscopy. The optical absorption were measured in the range of 300 to 800 nm and the absorption peaks due to the surface plasmon resonance of Ag particles were observed. z-scan results showed that the films exhibited large optical nonlinearities and the signs of the nonlinear absorption, β, and nonlinear refractive index, n2, changed with the increase of Ag concentration. The mechanism of the enhanced optical nonlinearities in Ag: BaTiO3 films is discussed. |
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| Keywords: | metal nanocomposite films laser deposition nonlinear optics |
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