| AgOx型超分辨近场结构的非线性光学特性研究 |
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| 引用本文： | 王沛,鲁拥华,唐麟,章江英,明海,何符汉,张勋豪,蔡定平.AgOx型超分辨近场结构的非线性光学特性研究[J].中国激光,2005,32(2):88-191. |
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| 作者姓名： | 王沛 鲁拥华 唐麟 章江英 明海 何符汉 张勋豪 蔡定平 |
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| 作者单位： | 1. 中国科学技术大学物理系,安徽,合肥,230026
2. 台湾大学物理系,台北,10617 |
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| 基金项目： | 国家自然科学基金(90206002)，国家863计划(2002AA313030)，安徽省自然科学基金(03046204)资助项目 |
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| 摘 要： | 采用共焦Z扫描系统，以λ=532nm．脉冲宽度0．7ns．重复频率15．79kHz的脉冲半导体激光器作为入射光源，研究了AgOx超分辨近场结构(SuperRENS)薄膜样品的非线性光学性质．实验获得了其三阶非线性折射率系数随入射光功率的变化曲线．并与Au，Ag薄膜作了比较．讨论了光致非线性变化过程。结果表明，在聚焦激光作用下．AgOx超分辨近场结构薄膜样品存在一相变点．即解析出纳米Ag颗粒，满足了产生局域表面等离子体的激发和增强效应的条件。
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| 关 键 词： | 非线性光学 超分辨近场结构 Z扫描 AgOx薄膜 |
| 收稿时间： | 2003/8/18 |
Investigation on Nonlinear Optical Properties of AgOx-Type Super-Resolution Near-Field Structure |
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| WANG Pei,LU Yong-hua,TANG Lin,ZHANG Jiang-ying,MING Hai,HO Fu-han,CHANG Hun-hao,TSAI Ding-ping.Investigation on Nonlinear Optical Properties of AgOx-Type Super-Resolution Near-Field Structure[J].Chinese Journal of Lasers,2005,32(2):88-191. |
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| Authors: | WANG Pei LU Yong-hua TANG Lin ZHANG Jiang-ying MING Hai HO Fu-han CHANG Hun-hao TSAI Ding-ping |
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| Affiliation: | WANG Pei1,LU Yong-hua1,TANG Lin1,ZHANG Jiang-ying1,MING Hai1,HO Fu-han2,CHANG Hsun-hao2,TSAI Ding-ping2 1Department of Physics,University of Science and Technology of China,Hefei,Anhui 230026,China 2Department of Physics,University of Taiwan,Taipei 10617,China |
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| Abstract: | The nonlinear optical properties of the AgO x-type super-resolution near-field structure (SuperRENS) films were studied using confocal Z-scan technique with 0.7 ns, 532 nm laser pulses. Nonlinear refractive indexes at different laser power were obtained through close-aperture Z-scan and compared with the measured results of Au film and Ag film, The mechanisms of this change due to the photochemical reaction, thermal effects and optical response were discussed. The experimental results show that heat by laser illumination causes a phase transition, so results in the enhancement of the localized surface plasmon of dissociated Ag nanoparticles. |
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| Keywords: | nonlinear optics AgO x super-resolution near-field structure Z-scan AgO x film |
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