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| 基于局域表面等离子体共振的近场偏振测量 |
| Near-field polarization measurement based on local surface plasma resonance |
| 投稿时间：2018-04-27 |
| DOI：10.3969/j.issn.1005-5630.2019.02.001 |
| 中文关键词: 表面等离子体 偏振态测量 近场 |
| 英文关键词:surface plasmons polarization measurement near-field |
| 基金项目:科技部973项目（2015CB352001）；上海市科委地方院校能力建设项目（15140502600） |
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| 中文摘要: |
| 在近场条件下金纳米粒子能引起光场矢量局部变化，针对金纳米粒子的这一特性，提出了一种检测近场光偏振态的新方法。将半径为50 nm的金纳米小球组成金纳米粒子阵列结构，利用该结构产生一定的光强分布图案，用于检测不同偏振态的光场矢量。利用数值模拟软件FDTD对金纳米粒子阵列结构进行模拟仿真，结果表明，从仿真图案上可以直观地分辨出5种不同偏振态的光场。 |
| 英文摘要: |
| Due to the local variations of the electric-field vector caused by a single gold nanoparticle in the near-field, a new method of detecting near-field polarization states is proposed. A gold nanoparticle array with a radius of 50 nm is designed to detect the electric-field vector of different polarization. The gold nanoparticle causes local changes of the electric field vector and produces certain intensity patterns to detect the electric vectors of different polarization states. In this paper, the measurement results of five different polarization states have been mapped by FDTD, which can be distinguished visually and also relative to the different polarization properties. |
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