| 十字形银纳米结构的表面等离子体光子学性质 |
| |
| 引用本文： | 钟明亮,李山,熊祖洪,张中月.十字形银纳米结构的表面等离子体光子学性质[J].物理学报,2012,61(2):27803-027803. |
| |
| 作者姓名： | 钟明亮 李山 熊祖洪 张中月 |
| |
| 作者单位： | 西南大学物理科学与技术学院, 重庆 400715;西南大学物理科学与技术学院, 重庆 400715;西南大学物理科学与技术学院, 重庆 400715;西南大学物理科学与技术学院, 重庆 400715 |
| |
| 基金项目： | 国家自然科学基金(批准号: 11004160和10974157), 重庆市科委自然科学基金(批准号: CSTC2010BB4005), 中央高等院校基本科研业务专项(批准号: XDJK2009C078和XDJK2009A001) 和国家大学生创新性实验计划(批准号: 101063523)资助的课题. |
| |
| 摘 要： | 本文应用离散偶极子近似方法计算了十字形银纳米结构的消光光谱及其近场电场强度分布. 研究表明相比于单根纳米棒, 十字形纳米结构能够提供更强的表面电场; 由于相邻凸起间的电场耦合作用, 当入射光的偏振方向改变时, 在十字形纳米结构的侧表面总能激发出较强的电场.另外, 本文还系统地研究了十字形纳米结构的形貌参数对其表面等离子体共振峰的影响. 这些结果将会指导十字形纳米结构的制备, 以满足其在表面增强拉曼散射中的应用.
|
| 关 键 词： | 十字形银纳米结构 表面等离子体共振 偏振 离散偶极子近似 |
| 收稿时间： | 2012-02-27 |
Plasmonic properties of silver cross-shape nanostructure |
| |
| Zhong Ming-Liang,Li Shan,Xiong Zu-Hong and Zhang Zhong-Yue.Plasmonic properties of silver cross-shape nanostructure[J].Acta Physica Sinica,2012,61(2):27803-027803. |
| |
| Authors: | Zhong Ming-Liang Li Shan Xiong Zu-Hong and Zhang Zhong-Yue |
| |
| Institution: | School of Physical Science and Technology, Southwest University, Chongqing 400715, China;School of Physical Science and Technology, Southwest University, Chongqing 400715, China;School of Physical Science and Technology, Southwest University, Chongqing 400715, China;School of Physical Science and Technology, Southwest University, Chongqing 400715, China |
| |
| Abstract: | The extinction spectra and the electric field distributions of the cross-shaped nanostructures are calculated by the discrete dipole approximation method. Compared with the individual nanorod, the cross-shape nanostructure can generate high local electric fields at the lateral surface. Because of the electric field couplings between adjacent protruding parts, much enhanced electric fields always occur at the lateral surface of the cross-shape nanostructure, with the incident polarization direction varied. In addition, the effects of the structural parameters of the cross-shape nanostructures on their plasmonic properties are also investigated. These results would guide the preparation of the cross-shape nanostructures for their applications in surface enhanced Raman scattering. |
| |
| Keywords: | Ag cross-shaped nanostructure surface plasmon resonance polarization discrete dipole approximation |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《物理学报》浏览原始摘要信息 |
| 点击此处可从《物理学报》下载免费的PDF全文 |
|
