| 应用平行隔板增强纳米球表面电场 |
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| 引用本文： | 李雪莲,张志东,王红艳,熊祖洪,张中月.应用平行隔板增强纳米球表面电场[J].物理学报,2011,60(4):47807-047807. |
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| 作者姓名： | 李雪莲 张志东 王红艳 熊祖洪 张中月 |
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| 作者单位： | (1)西南大学物理科学与技术学院,重庆 400715; (2)西南交通大学高温高压物理研究所,成都 610031 |
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| 基金项目： | 国家自然科学基金(批准号:11004160,10974157,10974161),中央高校基本科研业务费专项(批准号:XDJK2009C078,XDJK2009A001),西南大学科研基金(批准号:SWU109024)资助的课题. |
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| 摘 要： | 球形纳米粒子已经被广泛地应用于表面增强拉曼散射.为进一步提高纳米球表面电场,从而提高表面增强拉曼散射信号强度,本文设计了平行隔板纳米球结构.离散偶极子近似计算结果表明,应用平行隔板后,纳米球表面电场得到了大幅度增强,故平行隔板纳米球结构更适合作为表面增强拉曼散射衬底,用于生物分子探测.另外,本文还系统地研究了平行隔板结构参数对整个平行隔板纳米球结构光学性质的影响.
关键词：
银纳米球
平行隔板
表面等离子体
离散偶极子近似
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| 关 键 词： | 银纳米球 平行隔板 表面等离子体 离散偶极子近似 |
| 收稿时间： | 2010-05-21 |
Enhancing electric fields around nanospheres by parallel clapboards |
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| Li Xue-Lian,Zhang Zhi-Dong,Wang Hong-Yan,Xiong Zu-Hong,Zhang Zhong-Yue.Enhancing electric fields around nanospheres by parallel clapboards[J].Acta Physica Sinica,2011,60(4):47807-047807. |
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| Authors: | Li Xue-Lian Zhang Zhi-Dong Wang Hong-Yan Xiong Zu-Hong Zhang Zhong-Yue |
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| Institution: | School of Physical Science and Technology, Southwest University, Chongqing 400715, China;Institute of High temperature and High Pressure Physics, Southwest Jiaotong University, Chengdu 610031, China;Institute of High temperature and High Pressure Physics, Southwest Jiaotong University, Chengdu 610031, China;School of Physical Science and Technology, Southwest University, Chongqing 400715, China;School of Physical Science and Technology, Southwest University, Chongqing 400715, China |
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| Abstract: | Nanospheres are widely used as the substrates for surface enhanced Raman scattering (SERS). In order to further enhance the electric fields around nanospheres and improve the SERS intensity, in this paper, we introduce a novel nanostructure which is composed of a couple of parallel clapboards and a clamped nanosphere. The discrete dipole approximation calculation results indicate that when the parallel clapboards are used, the electric fields around the nanosphere are much enhanced. Therefore, the nanospheres clamped by parallel clapboards may work well as the SERS substrates. In addition, the effects of the structural parameters of parallel clapboards are also investigated. |
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| Keywords: | silver nanosphere parallel clapboard surface plasmon discrete dipole approximation |
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